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(2*x+x-10.5+16)/2 = 2*x+0.75 // - 2*x+0.75
(2*x+x-10.5+16)/2-(2*x)-0.75 = 0
(2*x+x-10.5+16)/2-2*x-0.75 = 0
(3*x+5.5)/2-2*x-0.75 = 0
(3*x+5.5)/2+(-2*2*x)/2+(-0.75*2)/2 = 0
3*x-2*2*x-0.75*2+5.5 = 0
5.5-x-1.5 = 0
4-x = 0
(4-x)/2 = 0
(4-x)/2 = 0 // * 2
4-x = 0
4-x = 0 // - 4
-x = -4 // * -1
x = 4
x = 4
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