4(3a-9)=84

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Solution for 4(3a-9)=84 equation:


Simplifying
4(3a + -9) = 84

Reorder the terms:
4(-9 + 3a) = 84
(-9 * 4 + 3a * 4) = 84
(-36 + 12a) = 84

Solving
-36 + 12a = 84

Solving for variable 'a'.

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

Add '36' to each side of the equation.
-36 + 36 + 12a = 84 + 36

Combine like terms: -36 + 36 = 0
0 + 12a = 84 + 36
12a = 84 + 36

Combine like terms: 84 + 36 = 120
12a = 120

Divide each side by '12'.
a = 10

Simplifying
a = 10

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