63=18-a

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Solution for 63=18-a equation:


Simplifying
63 = 18 + -1a

Solving
63 = 18 + -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.
63 + a = 18 + -1a + a

Combine like terms: -1a + a = 0
63 + a = 18 + 0
63 + a = 18

Add '-63' to each side of the equation.
63 + -63 + a = 18 + -63

Combine like terms: 63 + -63 = 0
0 + a = 18 + -63
a = 18 + -63

Combine like terms: 18 + -63 = -45
a = -45

Simplifying
a = -45

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