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-4x=2-18
-4x=-16
-4x/-4x=-16/-4
x= -4
2. 5(7+x) = 15(1+x)
35+5x = 15+15x
5x-15x = 15-35
-10x = -20
-10x/-10x = -20/-10
x=2
-4x = 2-18
-4x = -16
x =4
2. 5(7 + x) = 15(1+x)
35 + 5x = 15 + 15x
5x-15x = 15-35
-10x = -20
x = 2