7(a+9)=84

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Solution for 7(a+9)=84 equation: 


Simplifying
7(a + 9) = 84

Reorder the terms:
7(9 + a) = 84
(9 * 7 + a * 7) = 84
(63 + 7a) = 84

Solving
63 + 7a = 84

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 + 7a = 84 + -63

Combine like terms: 63 + -63 = 0
0 + 7a = 84 + -63
7a = 84 + -63

Combine like terms: 84 + -63 = 21
7a = 21

Divide each side by '7'.
a = 3

Simplifying
a = 3

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