13+13a=-(-7a-3)

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Solution for 13+13a=-(-7a-3) equation:


Simplifying
13 + 13a = -1(-7a + -3)

Reorder the terms:
13 + 13a = -1(-3 + -7a)
13 + 13a = (-3 * -1 + -7a * -1)
13 + 13a = (3 + 7a)

Solving
13 + 13a = 3 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
13 + 13a + -7a = 3 + 7a + -7a

Combine like terms: 13a + -7a = 6a
13 + 6a = 3 + 7a + -7a

Combine like terms: 7a + -7a = 0
13 + 6a = 3 + 0
13 + 6a = 3

Add '-13' to each side of the equation.
13 + -13 + 6a = 3 + -13

Combine like terms: 13 + -13 = 0
0 + 6a = 3 + -13
6a = 3 + -13

Combine like terms: 3 + -13 = -10
6a = -10

Divide each side by '6'.
a = -1.666666667

Simplifying
a = -1.666666667

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