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2*x+8 = (4/7)*x+4 // - (4/7)*x+4
2*x-((4/7)*x)-4+8 = 0
2*x+(-4/7)*x-4+8 = 0
10/7*x+4 = 0 // - 4
10/7*x = -4 // : 10/7
x = -4/10/7
x = -14/5
x = -14/5
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