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JoãoVitorMC Group TitleBest ResponseYou've already chosen the best response.0
only if x=0
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
x is the same as 1x 4x is 4 x If you had 1 4 what do you get?
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
1  4 = ?
 one year ago

EmmaH Group TitleBest ResponseYou've already chosen the best response.0
im 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
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Right, so since 1  4 = 5, then x  4x = 5x
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Now the system. Again, you have the two equations solved for y already, so use substitution.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Do you remember from the two previous systems what to do next?
 one year ago

EmmaH Group TitleBest ResponseYou've already chosen the best response.0
yes im working ion it
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Ok, let me see what you're up to since you're having trouble with it.
 one year ago

EmmaH Group TitleBest ResponseYou've already chosen the best response.0
ok so i had 2x=4x+7 2x +2=4x+7+2 x=4x+9 x4x=9 now im stuck
 one year ago

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

seanwalsh1984 Group TitleBest ResponseYou've already chosen the best response.0
x (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.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
2  x = 4x + 7 2  2  x = 4x + 7  2 x = 4x + 5 Now subtract 4x from both sides
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
x  4x = 4x  4x + 5 5x = 5
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356283149364:dw
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
right, x = 1
 one year ago

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

EmmaH Group TitleBest ResponseYou've already chosen the best response.0
sorry i had to do something i do it one sec
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
y = 3. You're right, but remember x = 1, not x = 1
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
dw:1356283635553:dw
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
You're welcome.
 one year ago

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

EmmaH Group TitleBest ResponseYou've already chosen the best response.0
i think its true
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Substitute the ordered pair into both equations. If it makes them both true, it's a solution.
 one year ago

EmmaH Group TitleBest ResponseYou've already chosen the best response.0
ok i did it its true
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
4x + 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.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.1
Good job!
 one year ago
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