7=-2a+4a-7

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Solution for 7=-2a+4a-7 equation: 


a in (-oo:+oo)

7 = 4*a-2*a-7 // - 4*a-2*a-7

7-(-2*a)-(4*a)+7 = 0

2*a-4*a+7+7 = 0

14-2*a = 0 // - 14

-2*a = -14 // : -2

a = -14/(-2)

a = 7

a = 7

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