Answer:
-18
Explanation:
a - b
a = -7
b = 11
Insert -7 for 'a' and 11 for 'b'
-7 - 11
= -18
y= 2*x / x+3 that is my answer
a) -3x -2y = 12
b) 10x = -15y + 60
c) 6x +9y = 18
