3 х - 10 y = -70

4 х + 9y = 63

(0,7)

Step-by-step explanation:

(I'm assuming you have to solve the system of equations)

3x - 10y = - 70

4x + 9y = 63

Solving by elimination.

Eliminate x first, so we need the x-component of both equations to have the same number but opposite sign. So i'm going to multiply the first by - 4 and the second by + 3.

//I could have also done + 3 to first and - 4 to second

-4 (3x - 10y = - 70)

3 (4x + 9y = 63)

-12x + 40y = 280

12x + 27y = 189

Add the equations / /x's cancel

67y = 469

Divide both side by 67, y=7

Plug in y into any original equation to solve to x

3x - 10 (7) = - 70

3x - 70 = - 70

3x = 0

x=0