9(a+7)=90

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Solution for 9(a+7)=90 equation: 


Simplifying
9(a + 7) = 90

Reorder the terms:
9(7 + a) = 90
(7 * 9 + a * 9) = 90
(63 + 9a) = 90

Solving
63 + 9a = 90

Solving for variable 'a'.

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

Add '-63' to each side of the equation.
63 + -63 + 9a = 90 + -63

Combine like terms: 63 + -63 = 0
0 + 9a = 90 + -63
9a = 90 + -63

Combine like terms: 90 + -63 = 27
9a = 27

Divide each side by '9'.
a = 3

Simplifying
a = 3

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