7a+6a+6=7-21

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Solution for 7a+6a+6=7-21 equation:


Simplifying
7a + 6a + 6 = 7 + -21

Reorder the terms:
6 + 7a + 6a = 7 + -21

Combine like terms: 7a + 6a = 13a
6 + 13a = 7 + -21

Combine like terms: 7 + -21 = -14
6 + 13a = -14

Solving
6 + 13a = -14

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 + 13a = -14 + -6

Combine like terms: 6 + -6 = 0
0 + 13a = -14 + -6
13a = -14 + -6

Combine like terms: -14 + -6 = -20
13a = -20

Divide each side by '13'.
a = -1.538461538

Simplifying
a = -1.538461538

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