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6-(1.6*4) = -x/4 // + -x/4
6-(-x/4)-(1.6*4) = 0
(1/4)*x-6.4+6 = 0
1/4*x-0.4 = 0 // + 0.4
1/4*x = 0.4 // : 1/4
x = 0.4/1/4
x = 1.6
x = 1.6
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