-15=4a-7a+6

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Solution for -15=4a-7a+6 equation: 


a in (-oo:+oo)

-15 = 4*a-(7*a)+6 // - 4*a-(7*a)+6

7*a-(4*a)-15-6 = 0

7*a-4*a-15-6 = 0

3*a-21 = 0 // + 21

3*a = 21 // : 3

a = 21/3

a = 7

a = 7

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