$\left\{\begin{array}{ccc}y=4x-5\\y=3x+7&|\text{change the signs}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}y=4x-5\\-y=-3x-7\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad0=x-12\qquad\text{add 12 to both sides}\\\qquad\boxed{x=12}\\\\\text{Substitute the value of x to the first equation}\\\\y=4(12)-5\\y=48-5\\\boxed{y=43}\\\\Answer:\ x=12\ and\ y=43.$

7 0

4 years ago

NEED HELP ASAP ITS TIMED

Arturiano [62]

B. 39

Good luck on yourself timed exam!

4 0

4 years ago

How far did johnny travel in all? how long did it take

Anna [14]

Answer: We can't answer you if you don't say the problem.

7 0

4 years ago

Geometry proofs PLEASE HELP!!! Lots of points

avanturin [10]

Hello!

1) Given

2) Addition property of equality

3) Division property of equality

I hope it helps!

4 0

4 years ago