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-5*x-10 = -13/2 // + -13/2
-5*x-(-13/2)-10 = 0
13/2-5*x-10 = 0
-5*x-7/2 = 0 // + 7/2
-5*x = 7/2 // : -5
x = 7/2/(-5)
x = -7/10
x = -7/10
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