Question 639137
Hint:

Solve for x in -x+2y=11 to get


-x+2y=11


-x=11-2y


x = -11+2y


x = 2y - 11


Then replace 'x' in 3x-2y = -13 with 2y - 11 to get


3x-2y = -13


3(2y-11)-2y = -13


I'll let you finish