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2y - y = - 5
y = -5
b. 6x + 5 = 5x - 2
6x - 5x = -2 - 5
x = -7
c. 3z - 7 = 2z +7
3z - 2z = 7 + 7
z = 14
5 = -y
y = -5
5 + 2 = 5x -6x
7 = -x
x = -7
-7 - 7= 2z - 3z
-14 = -z
z= 14