What's the value of x?

y = 5x + 9

y = - x + 3

Answer: X=1.5

x = - 1

Step-by-step explanation:

y = 5x + 9 ... 1

y = - x + 3 ... 2

making x the subject of formula from equation 2

x = 3 - y ... 3

substituting equation 3 in 1, we have

y = 5 (3 - y) + 9

y = 15 - 5y + 9

y + 5y = 15 + 9

6y = 24

y = 24 / 6

= 4

substituting y = 4 in equation (3)

x = 3 - 4

x = - 1