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anonymous
 5 years ago
Solve using the substitution method.
5x − 7y = −16, 2x + 8y = 26
anonymous
 5 years ago
Solve using the substitution method. 5x − 7y = −16, 2x + 8y = 26

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Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Divide the second equation by 2 and solve it for x You will get x=134y Put that into the first equation in place ofx

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i would use the 2nd equation to substitute because the numbers are more simple. get down to x =( ) so 2x +8y = 26 2x = 26 8y x = (26  8y)/2 x = 13 4y now you can replace this x into the other equation 5x  7y = 16 replace the x 5(13  4y)  7y = 16 65  20y  7y = 16 solve for y 27y = 71 y = 3 replace y=3 into any equation to find x 2x + 8y = 26 2x + 8(3) = 26 2x + 24 = 26 2x = 2 x =1 y = 3

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ok mertsj I am still confused

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Can you divide the second equation by 2?

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Now subtract 4y from both sides.

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0So do you know how to substitute that in the other equation?

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Do you watch sports on tv?

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Well I thought you might know what it means when the coach substitutes one player for another. Any way, we have to take that name for x that we just found and replace x with it.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0would you divide the other side by 2 as weel

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Do you understand what I just did?

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Now use the distributive property and collect like terms

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0now math is my worst subject how do you do that

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0now how did you get that

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0The 5 outside the parentheses means to multiply everything in the parentheses by 5.

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0So I multiplied 5 by 13 and got 65. Then I multiplied 4y by 5 and got 20y

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Now 20y and 7y are like terms and they should be combined.

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Now subtract 65 from both sides.

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Now divide both sides by 27

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so would it be 27y/27y and 16/27y

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0Did you subtract 65 from BOTH SIDES?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yes I did than what do I do

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0So what do you have now? Then I can tell you what to do next.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0this is all I have down

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.05x − 7y = −16 5(134y)7y=16 5(134y)=6520y 6520y7y=16 20y+7y=27y 6527y=16 65 65  27y/27y=81/27 y=3 2x/2 + 8y/2 = 2b/2 x + 4y = 13 4y 4y x=134y

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0x=134y so replace y with 3 and find x

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok and that how both of them end

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.027y/27y=81/27 That is a step you did. You should have divided by 27 and NOT by y just 27

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0So yes. The solution is x = 1 and y = 3 which is the ordered pair (1,3) And if you would graph those equations, the two lines would cross at the point (1,3)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok but its just says solve so I don't have to graph it right

Mertsj
 5 years ago
Best ResponseYou've already chosen the best response.0That's right. You don't have to graph it. I just wanted you to know the connection between the solution of the system and the graph.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh ok great thank you so much you really helped
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