3/7=21/5x+4

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Solution for 3/7=21/5x+4 equation: 


x in (-oo:+oo)

3/7 = (21/5)*x+4 // - (21/5)*x+4

3/7-((21/5)*x)-4 = 0

(-21/5)*x+3/7-4 = 0

-21/5*x-25/7 = 0 // + 25/7

-21/5*x = 25/7 // : -21/5

x = 25/7/(-21/5)

x = -125/147

x = -125/147

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