43=15-a

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Solution for 43=15-a equation:


Simplifying
43 = 15 + -1a

Solving
43 = 15 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
43 + a = 15 + -1a + a

Combine like terms: -1a + a = 0
43 + a = 15 + 0
43 + a = 15

Add '-43' to each side of the equation.
43 + -43 + a = 15 + -43

Combine like terms: 43 + -43 = 0
0 + a = 15 + -43
a = 15 + -43

Combine like terms: 15 + -43 = -28
a = -28

Simplifying
a = -28

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