34=13-7a

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Solution for 34=13-7a equation:


Simplifying
34 = 13 + -7a

Solving
34 = 13 + -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.
34 + 7a = 13 + -7a + 7a

Combine like terms: -7a + 7a = 0
34 + 7a = 13 + 0
34 + 7a = 13

Add '-34' to each side of the equation.
34 + -34 + 7a = 13 + -34

Combine like terms: 34 + -34 = 0
0 + 7a = 13 + -34
7a = 13 + -34

Combine like terms: 13 + -34 = -21
7a = -21

Divide each side by '7'.
a = -3

Simplifying
a = -3

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