2=7-a

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Solution for 2=7-a equation:


Simplifying
2 = 7 + -1a

Solving
2 = 7 + -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.
2 + a = 7 + -1a + a

Combine like terms: -1a + a = 0
2 + a = 7 + 0
2 + a = 7

Add '-2' to each side of the equation.
2 + -2 + a = 7 + -2

Combine like terms: 2 + -2 = 0
0 + a = 7 + -2
a = 7 + -2

Combine like terms: 7 + -2 = 5
a = 5

Simplifying
a = 5

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