-4+a=17

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Solution for -4+a=17 equation: 


Simplifying
-4 + a = 17

Solving
-4 + a = 17

Solving for variable 'a'.

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

Add '4' to each side of the equation.
-4 + 4 + a = 17 + 4

Combine like terms: -4 + 4 = 0
0 + a = 17 + 4
a = 17 + 4

Combine like terms: 17 + 4 = 21
a = 21

Simplifying
a = 21

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