6+7a-4a=-18

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Solution for 6+7a-4a=-18 equation: 


Simplifying
6 + 7a + -4a = -18

Combine like terms: 7a + -4a = 3a
6 + 3a = -18

Solving
6 + 3a = -18

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + -6 + 3a = -18 + -6

Combine like terms: 6 + -6 = 0
0 + 3a = -18 + -6
3a = -18 + -6

Combine like terms: -18 + -6 = -24
3a = -24

Divide each side by '3'.
a = -8

Simplifying
a = -8

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