1/5-1/2b=7/10

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Solution for 1/5-1/2b=7/10 equation: 


b in (-oo:+oo)

1/5-((1/2)*b) = 7/10 // - 7/10

1/5-((1/2)*b)-(7/10) = 0

(-1/2)*b+1/5-7/10 = 0

-1/2*b-1/2 = 0 // + 1/2

-1/2*b = 1/2 // : -1/2

b = 1/2/(-1/2)

b = -1

b = -1

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