-7a+2a+9=20

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Solution for -7a+2a+9=20 equation:


Simplifying
-7a + 2a + 9 = 20

Reorder the terms:
9 + -7a + 2a = 20

Combine like terms: -7a + 2a = -5a
9 + -5a = 20

Solving
9 + -5a = 20

Solving for variable 'a'.

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

Add '-9' to each side of the equation.
9 + -9 + -5a = 20 + -9

Combine like terms: 9 + -9 = 0
0 + -5a = 20 + -9
-5a = 20 + -9

Combine like terms: 20 + -9 = 11
-5a = 11

Divide each side by '-5'.
a = -2.2

Simplifying
a = -2.2

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