Question

Solving systems of equations using substitution. y=7+x. y=3x +9

Answer 1

ok

y = 7 + x

y = 3x + 9

By substitution, I'll substitute "y"

7 + x = 3x + 9

7 - 9 = 3x - x

-2 = 2x

2x = -2

x = -2/2

x = -1

Find y

y = 7 - 1

y = 6

Result

x = -1, y = 6