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(3/2)*x-2.2 = 0.7*x-1 // - 0.7*x-1
(3/2)*x-(0.7*x)-2.2+1 = 0
(3/2)*x-0.7*x-2.2+1 = 0
0.8*x-1.2 = 0 // + 1.2
0.8*x = 1.2 // : 0.8
x = 1.2/0.8
x = 1.5
x = 1.5
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