7(d+9)=91

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Solution for 7(d+9)=91 equation: 


Simplifying
7(d + 9) = 91

Reorder the terms:
7(9 + d) = 91
(9 * 7 + d * 7) = 91
(63 + 7d) = 91

Solving
63 + 7d = 91

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Add '-63' to each side of the equation.
63 + -63 + 7d = 91 + -63

Combine like terms: 63 + -63 = 0
0 + 7d = 91 + -63
7d = 91 + -63

Combine like terms: 91 + -63 = 28
7d = 28

Divide each side by '7'.
d = 4

Simplifying
d = 4

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