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(1*(2*x+4*x))/2+3*x = 0
(2*x+4*x)/2+3*x = 0
(6*x)/2+3*x = 0
(6*x)/2+(2*3*x)/2 = 0
6*x+2*3*x = 0
12*x = 0
(12*x)/2 = 0
(12*x)/2 = 0 // * 2
12*x = 0
12*x = 0 // : 12
x = 0
x = 0
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