2=a+7

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Solution for 2=a+7 equation: 


Simplifying
2 = a + 7

Reorder the terms:
2 = 7 + a

Solving
2 = 7 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
2 + -1a = 7 + a + -1a

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

Add '-2' to each side of the equation.
2 + -2 + -1a = 7 + -2

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

Combine like terms: 7 + -2 = 5
-1a = 5

Divide each side by '-1'.
a = -5

Simplifying
a = -5

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