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(4/5)*x-7 = -27/5 // + -27/5
(4/5)*x-(-27/5)-7 = 0
(4/5)*x+27/5-7 = 0
4/5*x-8/5 = 0 // + 8/5
4/5*x = 8/5 // : 4/5
x = 8/5/4/5
x = 2
x = 2
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