7a+6a+a=7-21

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


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

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

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

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

Solving
14a = -14

Solving for variable 'a'.

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

Divide each side by '14'.
a = -1

Simplifying
a = -1

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