7(3a+3)=189

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Solution for 7(3a+3)=189 equation:


Simplifying
7(3a + 3) = 189

Reorder the terms:
7(3 + 3a) = 189
(3 * 7 + 3a * 7) = 189
(21 + 21a) = 189

Solving
21 + 21a = 189

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + 21a = 189 + -21

Combine like terms: 21 + -21 = 0
0 + 21a = 189 + -21
21a = 189 + -21

Combine like terms: 189 + -21 = 168
21a = 168

Divide each side by '21'.
a = 8

Simplifying
a = 8

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