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(2*x)/5 = 12-((3*x)/2) // - 12-((3*x)/2)
(2*x)/5+(3*x)/2-12 = 0
19/10*x-12 = 0 // + 12
19/10*x = 12 // : 19/10
x = 12/19/10
x = 120/19
x = 120/19
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