20a-15a-4a+2a=18

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Solution for 20a-15a-4a+2a=18 equation: 


Simplifying
20a + -15a + -4a + 2a = 18

Combine like terms: 20a + -15a = 5a
5a + -4a + 2a = 18

Combine like terms: 5a + -4a = 1a
1a + 2a = 18

Combine like terms: 1a + 2a = 3a
3a = 18

Solving
3a = 18

Solving for variable 'a'.

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

Divide each side by '3'.
a = 6

Simplifying
a = 6

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