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(1/3)*(x-30) = 35 // - 35
(1/3)*(x-30)-35 = 0
1/3*(x-30)-35 = 0
1/3*(x-30)-35 = 0
1/3*x-45 = 0
1/3*x-45 = 0
1/3*x-45 = 0 // + 45
1/3*x = 45 // : 1/3
x = 45/1/3
x = 135
x = 135
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