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(1/2)*(4*x-10) = 25-(3*x) // - 25-(3*x)
(1/2)*(4*x-10)+3*x-25 = 0
1/2*(4*x-10)+3*x-25 = 0
1/2*(4*x-10)+3*x-25 = 0
5*x-25-5 = 0
5*x-30 = 0
5*x-30 = 0
5*x-30 = 0 // + 30
5*x = 30 // : 5
x = 30/5
x = 6
x = 6
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