13-7a+9a=-a+1

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Solution for 13-7a+9a=-a+1 equation:


Simplifying
13 + -7a + 9a = -1a + 1

Combine like terms: -7a + 9a = 2a
13 + 2a = -1a + 1

Reorder the terms:
13 + 2a = 1 + -1a

Solving
13 + 2a = 1 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
13 + 2a + a = 1 + -1a + a

Combine like terms: 2a + a = 3a
13 + 3a = 1 + -1a + a

Combine like terms: -1a + a = 0
13 + 3a = 1 + 0
13 + 3a = 1

Add '-13' to each side of the equation.
13 + -13 + 3a = 1 + -13

Combine like terms: 13 + -13 = 0
0 + 3a = 1 + -13
3a = 1 + -13

Combine like terms: 1 + -13 = -12
3a = -12

Divide each side by '3'.
a = -4

Simplifying
a = -4

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