1-7a-4a=12

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Solution for 1-7a-4a=12 equation: 


Simplifying
1 + -7a + -4a = 12

Combine like terms: -7a + -4a = -11a
1 + -11a = 12

Solving
1 + -11a = 12

Solving for variable 'a'.

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

Add '-1' to each side of the equation.
1 + -1 + -11a = 12 + -1

Combine like terms: 1 + -1 = 0
0 + -11a = 12 + -1
-11a = 12 + -1

Combine like terms: 12 + -1 = 11
-11a = 11

Divide each side by '-11'.
a = -1

Simplifying
a = -1

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