3+7a+7=20+2a

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Solution for 3+7a+7=20+2a equation:


Simplifying
3 + 7a + 7 = 20 + 2a

Reorder the terms:
3 + 7 + 7a = 20 + 2a

Combine like terms: 3 + 7 = 10
10 + 7a = 20 + 2a

Solving
10 + 7a = 20 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
10 + 7a + -2a = 20 + 2a + -2a

Combine like terms: 7a + -2a = 5a
10 + 5a = 20 + 2a + -2a

Combine like terms: 2a + -2a = 0
10 + 5a = 20 + 0
10 + 5a = 20

Add '-10' to each side of the equation.
10 + -10 + 5a = 20 + -10

Combine like terms: 10 + -10 = 0
0 + 5a = 20 + -10
5a = 20 + -10

Combine like terms: 20 + -10 = 10
5a = 10

Divide each side by '5'.
a = 2

Simplifying
a = 2

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