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(9/5)*x-10 = (3/10)*x-(7/5) // - (3/10)*x-(7/5)
(9/5)*x-((3/10)*x)+7/5-10 = 0
(9/5)*x+(-3/10)*x+7/5-10 = 0
3/2*x-43/5 = 0 // + 43/5
3/2*x = 43/5 // : 3/2
x = 43/5/3/2
x = 86/15
x = 86/15
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