a-1-2=7

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Solution for a-1-2=7 equation: 


Simplifying
a + -1 + -2 = 7

Reorder the terms:
-1 + -2 + a = 7

Combine like terms: -1 + -2 = -3
-3 + a = 7

Solving
-3 + a = 7

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + a = 7 + 3

Combine like terms: -3 + 3 = 0
0 + a = 7 + 3
a = 7 + 3

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

Simplifying
a = 10

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