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(2/3)*(7-(2*x)) = 10 // - 10
(2/3)*(7-(2*x))-10 = 0
(2/3)*(7-2*x)-10 = 0
2/3*(7-2*x)-10 = 0
2/3*(7-2*x)-10 = 0
-4/3*x-16/3 = 0
-4/3*x-16/3 = 0
-4/3*x-16/3 = 0 // + 16/3
-4/3*x = 16/3 // : -4/3
x = 16/3/(-4/3)
x = -4
x = -4
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