-1-7a+2a=-7/2

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Solution for -1-7a+2a=-7/2 equation: 


a in (-oo:+oo)

2*a-(7*a)-1 = -7/2 // + -7/2

2*a-(7*a)-(-7/2)-1 = 0

2*a-7*a+7/2-1 = 0

5/2-5*a = 0 // - 5/2

-5*a = -5/2 // : -5

a = -5/2/(-5)

a = 1/2

a = 1/2

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