13+7a=6+7(5a-7)

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Solution for 13+7a=6+7(5a-7) equation:


Simplifying
13 + 7a = 6 + 7(5a + -7)

Reorder the terms:
13 + 7a = 6 + 7(-7 + 5a)
13 + 7a = 6 + (-7 * 7 + 5a * 7)
13 + 7a = 6 + (-49 + 35a)

Combine like terms: 6 + -49 = -43
13 + 7a = -43 + 35a

Solving
13 + 7a = -43 + 35a

Solving for variable 'a'.

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

Add '-35a' to each side of the equation.
13 + 7a + -35a = -43 + 35a + -35a

Combine like terms: 7a + -35a = -28a
13 + -28a = -43 + 35a + -35a

Combine like terms: 35a + -35a = 0
13 + -28a = -43 + 0
13 + -28a = -43

Add '-13' to each side of the equation.
13 + -13 + -28a = -43 + -13

Combine like terms: 13 + -13 = 0
0 + -28a = -43 + -13
-28a = -43 + -13

Combine like terms: -43 + -13 = -56
-28a = -56

Divide each side by '-28'.
a = 2

Simplifying
a = 2

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