20+3a=40-7a

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Solution for 20+3a=40-7a equation:


Simplifying
20 + 3a = 40 + -7a

Solving
20 + 3a = 40 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
20 + 3a + 7a = 40 + -7a + 7a

Combine like terms: 3a + 7a = 10a
20 + 10a = 40 + -7a + 7a

Combine like terms: -7a + 7a = 0
20 + 10a = 40 + 0
20 + 10a = 40

Add '-20' to each side of the equation.
20 + -20 + 10a = 40 + -20

Combine like terms: 20 + -20 = 0
0 + 10a = 40 + -20
10a = 40 + -20

Combine like terms: 40 + -20 = 20
10a = 20

Divide each side by '10'.
a = 2

Simplifying
a = 2

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