3=10-a

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Solution for 3=10-a equation:


Simplifying
3 = 10 + -1a

Solving
3 = 10 + -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.
3 + a = 10 + -1a + a

Combine like terms: -1a + a = 0
3 + a = 10 + 0
3 + a = 10

Add '-3' to each side of the equation.
3 + -3 + a = 10 + -3

Combine like terms: 3 + -3 = 0
0 + a = 10 + -3
a = 10 + -3

Combine like terms: 10 + -3 = 7
a = 7

Simplifying
a = 7

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