Answer:
x = 4 ; y = -5
Step-by-step explanation:
we have to bring -2x in the right side of equal. To do this we have to change the sign of its coefficient
2y = 2x - 18
now we have to divide the two members by two
y = x - 9
now we can proceed
3x -17 = x-9
2x = 8
x = 4
now we can take one of the two expression and sobstitute x with 4 , so we can find y
y = 4 - 9
y = -5
