7a+-7=13

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Solution for 7a+-7=13 equation: 


Simplifying
7a + -7 = 13

Reorder the terms:
-7 + 7a = 13

Solving
-7 + 7a = 13

Solving for variable 'a'.

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

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

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

Combine like terms: 13 + 7 = 20
7a = 20

Divide each side by '7'.
a = 2.857142857

Simplifying
a = 2.857142857

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