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x in (-oo:+oo)
8*x-7 = (15/2)*x-6 // - (15/2)*x-6
8*x-((15/2)*x)-7+6 = 0
8*x+(-15/2)*x-7+6 = 0
1/2*x-1 = 0 // + 1
1/2*x = 1 // : 1/2
x = 1/1/2
x = 2
x = 2
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