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4*x-((1/7)*x)-7 = -22/7 // + -22/7
4*x-((1/7)*x)-(-22/7)-7 = 0
(-1/7)*x+4*x+22/7-7 = 0
27/7*x-27/7 = 0 // + 27/7
27/7*x = 27/7 // : 27/7
x = 27/7/27/7
x = 1
x = 1
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