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EmmaH
 3 years ago
is x4x=3x??
EmmaH
 3 years ago
is x4x=3x??

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mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1x is the same as 1x 4x is 4 x If you had 1 4 what do you get?

EmmaH
 3 years ago
Best ResponseYou've already chosen the best response.0im having a lot of trouble with this Solve the system. y = 2  x and y = 4x + 7 (1, 1) (1, 3) (1, 3) (1, 1) no solution im prettyy sure tis no solution

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1Right, so since 1  4 = 5, then x  4x = 5x

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1Now the system. Again, you have the two equations solved for y already, so use substitution.

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1Do you remember from the two previous systems what to do next?

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1Ok, let me see what you're up to since you're having trouble with it.

EmmaH
 3 years ago
Best ResponseYou've already chosen the best response.0ok so i had 2x=4x+7 2x +2=4x+7+2 x=4x+9 x4x=9 now im stuck

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1The 2 on the left side is positive, so you need to subtract 2 from both sides.

seanwalsh1984
 3 years ago
Best ResponseYou've already chosen the best response.0x (so 1x) take away 4 more x's. It's like being $1 in the hole in the bank account. Spend four more bucks, and you are $5 in the whole, not $3. However... x  4x = 3x is interesting because: x  4x + x = 3x + x Then we have 4x = 3x Then as said above, if x = 0, then it is true, otherwise no. Hope this helps.

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.12  x = 4x + 7 2  2  x = 4x + 7  2 x = 4x + 5 Now subtract 4x from both sides

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1x  4x = 4x  4x + 5 5x = 5

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1356283149364:dw

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1Now insert this value of x in one of the original equations, and solve for y

EmmaH
 3 years ago
Best ResponseYou've already chosen the best response.0sorry i had to do something i do it one sec

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1y = 3. You're right, but remember x = 1, not x = 1

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1356283635553:dw

EmmaH
 3 years ago
Best ResponseYou've already chosen the best response.0one more question The ordered pair (1, 1) is a solution of the system 4x + 2y = 2 and x + y = 2. True False

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.1Substitute the ordered pair into both equations. If it makes them both true, it's a solution.

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.14x + 2y = 2 Try (1, 1) Is 4(1) + 2(1) = 2 ? 4  2 = 2? Yes. The ordered pair works in the first equation. Now try the second. x + y = 2 Is 1 + (1 ) = 1 true? 2 = 2. It's true. You are correct, (1, 1) is a solution.
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