7(7a-9)=84

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


Simplifying
7(7a + -9) = 84

Reorder the terms:
7(-9 + 7a) = 84
(-9 * 7 + 7a * 7) = 84
(-63 + 49a) = 84

Solving
-63 + 49a = 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 + 49a = 84 + 63

Combine like terms: -63 + 63 = 0
0 + 49a = 84 + 63
49a = 84 + 63

Combine like terms: 84 + 63 = 147
49a = 147

Divide each side by '49'.
a = 3

Simplifying
a = 3

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