(1/3)(21-2A)=6-1

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Solution for (1/3)(21-2A)=6-1 equation: 


A in (-oo:+oo)

(1/3)*(21-(2*A)) = 6-1 // - 6-1

(1/3)*(21-(2*A))-6+1 = 0

(1/3)*(21-2*A)-6+1 = 0

1/3*(21-2*A)-6+1 = 0

1/3*(21-2*A)-6+1 = 0

1-2/3*A+1 = 0

2-2/3*A = 0

2-2/3*A = 0

2-2/3*A = 0 // - 2

-2/3*A = -2 // : -2/3

A = -2/(-2/3)

A = 3

A = 3

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