solve and comparison:

a)4x-9y+4
6x+15y=-13

im so lost!!!!!

3 answers

srry
it's

solve and comparison:

a)4x-9y=4
6x+15y=-13

im so lost!!!!!
Help me is NOT the name of this post. Math or Algebra.

Sra
4x-9y=4
6x+15y=-13

To solve, first isolate x (or y) in one of the equations.

4x = 4 + 9y
x = 1 + 2.25y

Substitute the right hand portion for x in the second equation.

6(1 + 2.25y) + 15y = -13

Solve for y. Put that value into the first equation to solve for x. To check, put both values into the second equation.

I hope this helps. Thanks for asking.