13+4a=-91

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Solution for 13+4a=-91 equation: 


Simplifying
13 + 4a = -91

Solving
13 + 4a = -91

Solving for variable 'a'.

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

Add '-13' to each side of the equation.
13 + -13 + 4a = -91 + -13

Combine like terms: 13 + -13 = 0
0 + 4a = -91 + -13
4a = -91 + -13

Combine like terms: -91 + -13 = -104
4a = -104

Divide each side by '4'.
a = -26

Simplifying
a = -26

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