Question 111747
y=3x+8 substitute (3x+8) for y in the other equation.
x+(3x+8)=76
x+3x+8=76
4x=76-8
4x=68
x=68/4
x=17 answer.
y=3*17+8
y=51+8
y=59 answer.
proof
17+59=76
76=76