Question 1204538
Solve the system by substitution.
y=−4x
y=3x+28

substitute y in y=3x+28

-4x =3x+28

subtract 3x from both sides

-4x-3x = 3x-3x+28

-7x = 28

/-7


x = 28/-7

x=-4

y=-4x

y=(-4)(-4)=16

 The solution 
x = -4
y = 16