7(3-2d)=-21

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Solution for 7(3-2d)=-21 equation: 


d in (-oo:+oo)

7*(3-(2*d)) = -21 // + 21

7*(3-(2*d))+21 = 0

7*(3-2*d)+21 = 0

7*(3-2*d)+21 = 0

42-14*d = 0

42-14*d = 0

42-14*d = 0 // - 42

-14*d = -42 // : -14

d = -42/(-14)

d = 3

d = 3

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