Question

Solve the following system of equations using substitution:

y=x+3

x+2y=3

Solution (x, y):

Answer 1

x = -1

y = 2

Explanation:

y = x+3

x+2y = 3

substitute y

x+2(x+3) = 3

simplify

3x+6 = 3

subtract 6 from both sides

3x = -3

x = -1

y = -1+3 = 2