z=5z/7-7

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Solution for z=5z/7-7 equation: 


z in (-oo:+oo)

z = (5*z)/7-7 // - (5*z)/7-7

z-((5*z)/7)+7 = 0

z+(-5/7)*z+7 = 0

2/7*z+7 = 0 // - 7

2/7*z = -7 // : 2/7

z = -7/2/7

z = -49/2

z = -49/2

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