(7+2a)*3-20=

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Solution for (7+2a)*3-20= equation:


Simplifying
(7 + 2a) * 3 + -20 = 0

Reorder the terms for easier multiplication:
3(7 + 2a) + -20 = 0
(7 * 3 + 2a * 3) + -20 = 0
(21 + 6a) + -20 = 0

Reorder the terms:
21 + -20 + 6a = 0

Combine like terms: 21 + -20 = 1
1 + 6a = 0

Solving
1 + 6a = 0

Solving for variable 'a'.

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

Add '-1' to each side of the equation.
1 + -1 + 6a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 6a = 0 + -1
6a = 0 + -1

Combine like terms: 0 + -1 = -1
6a = -1

Divide each side by '6'.
a = -0.1666666667

Simplifying
a = -0.1666666667

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