1-21a/2=-3a/2-(7a/2-2)

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Solution for 1-21a/2=-3a/2-(7a/2-2) equation: 


a in (-oo:+oo)

1-((21*a)/2) = (-3*a)/2-((7*a)/2)+2 // - (-3*a)/2-((7*a)/2)+2

(7*a)/2-((21*a)/2)-((-3*a)/2)-2+1 = 0

(-21/2)*a+(3/2)*a+(7*a)/2-2+1 = 0

-11/2*a-1 = 0 // + 1

-11/2*a = 1 // : -11/2

a = 1/(-11/2)

a = -2/11

a = -2/11

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