Solve the system of equations by using substitution

Question

y=2x+3
y=x+2

Answer 1

since y = 2x+3,
2x+3 = x+2
x = -1

since x = y-2,
y = 2(y-2)+3
y = 2y-1
y = 1

Answer 2

Y=2
2x+y=8