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7*((1/2)*x+5/2)+3*x = 24 // - 24
7*((1/2)*x+5/2)+3*x-24 = 0
7*(1/2*x+5/2)+3*x-24 = 0
7*(1/2*x+5/2)+3*x-24 = 0
13/2*x-24+35/2 = 0
13/2*x-13/2 = 0
13/2*x-13/2 = 0
13/2*x-13/2 = 0 // + 13/2
13/2*x = 13/2 // : 13/2
x = 13/2/13/2
x = 1
x = 1
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