7a+3a+2-a=20

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


Simplifying
7a + 3a + 2 + -1a = 20

Reorder the terms:
2 + 7a + 3a + -1a = 20

Combine like terms: 7a + 3a = 10a
2 + 10a + -1a = 20

Combine like terms: 10a + -1a = 9a
2 + 9a = 20

Solving
2 + 9a = 20

Solving for variable 'a'.

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

Add '-2' to each side of the equation.
2 + -2 + 9a = 20 + -2

Combine like terms: 2 + -2 = 0
0 + 9a = 20 + -2
9a = 20 + -2

Combine like terms: 20 + -2 = 18
9a = 18

Divide each side by '9'.
a = 2

Simplifying
a = 2

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