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(1/2)*(x-10) = 3*(3*x-7) // - 3*(3*x-7)
(1/2)*(x-10)-(3*(3*x-7)) = 0
(1/2)*(x-10)-3*(3*x-7) = 0
1/2*(x-10)-3*(3*x-7) = 0
1/2*(x-10)-3*(3*x-7) = 0
16-17/2*x = 0
16-17/2*x = 0
16-17/2*x = 0 // - 16
-17/2*x = -16 // : -17/2
x = -16/(-17/2)
x = 32/17
x = 32/17
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