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(-3/10)*x-3 = 5*x-10 // - 5*x-10
(-3/10)*x-(5*x)-3+10 = 0
(-3/10)*x-5*x-3+10 = 0
7-53/10*x = 0 // - 7
-53/10*x = -7 // : -53/10
x = -7/(-53/10)
x = 70/53
x = 70/53
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