3*(a+7)=51

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Solution for 3*(a+7)=51 equation: 


Simplifying
3(a + 7) = 51

Reorder the terms:
3(7 + a) = 51
(7 * 3 + a * 3) = 51
(21 + 3a) = 51

Solving
21 + 3a = 51

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 + 3a = 51 + -21

Combine like terms: 21 + -21 = 0
0 + 3a = 51 + -21
3a = 51 + -21

Combine like terms: 51 + -21 = 30
3a = 30

Divide each side by '3'.
a = 10

Simplifying
a = 10

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