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3*x+3*x+1/2 = 49/2 // - 49/2
3*x+3*x+1/2-(49/2) = 0
3*x+3*x+1/2-49/2 = 0
6*x-24 = 0 // + 24
6*x = 24 // : 6
x = 24/6
x = 4
x = 4
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