7x-21=8/10

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Solution for 7x-21=8/10 equation: 


x in (-oo:+oo)

7*x-21 = 8/10 // - 8/10

7*x-(8/10)-21 = 0

7*x-4/5-21 = 0

7*x-109/5 = 0 // + 109/5

7*x = 109/5 // : 7

x = 109/5/7

x = 109/35

x = 109/35

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