Answer:
x = -1
y = 7
Step-by-step explanation:
to solve this system of linear equation using substitution methods
we would say that let
y=2x+9 ................................................................. equation 1
y=6−x................................................................. equation 2
substitute equation 1 into equation2
2x + 9 = 6 - x
combine the like terms
2x + x = 6 - 9
3x = - 3
divide both sides by the coefficient of x which is 3
3x/3 = -3/3
x = -1
put the value of x = -1 into equation 1
y=2x+9 ................................................................. equation 1
y = 2(-1) + 9
y = -2 + 9
y = 7
