Question

Use substitution to solve the system.
y = 3x +16
4x - 5y = -25

Answer 1

(-5,1)

Explanation:

y=3x+16

4x-5y=-25

substitute the given value of y into the equation.

4x-5(3x+16)=-25

solve

x=5

substitute the given value of x into the equation.

y=3x(-5)+16

solve

y=1

(-5,1)

Answer 2

x=-5

y=1

Explanation:

4x-5y=-25

4x-5(3x+16)=-25

-11x-80=-25

-11x-80+80=-25+80

-11=55

-11x/-11=55/-11

x=-5

y=3x+16

y=3(-5)+16

y=-15+16

y=1