Question

Help Please I need this turned in before grades get put in!!!!!!!!!

Answer 1

Explanation:

you know the value of y.

so substitute it into the first equation

-4x + 7(3x+15) = 20

now solve for x

-4x +21x + 105 = 20

17x + 105 =20

17x = -85

x = -5

now put the value of x into the y equation.

y = 3(-5) +15

y = -15 + 15

y = 0