22=15-7a

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Solution for 22=15-7a equation:


Simplifying
22 = 15 + -7a

Solving
22 = 15 + -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.
22 + 7a = 15 + -7a + 7a

Combine like terms: -7a + 7a = 0
22 + 7a = 15 + 0
22 + 7a = 15

Add '-22' to each side of the equation.
22 + -22 + 7a = 15 + -22

Combine like terms: 22 + -22 = 0
0 + 7a = 15 + -22
7a = 15 + -22

Combine like terms: 15 + -22 = -7
7a = -7

Divide each side by '7'.
a = -1

Simplifying
a = -1

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