17=a-4

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Solution for 17=a-4 equation:


Simplifying
17 = a + -4

Reorder the terms:
17 = -4 + a

Solving
17 = -4 + 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.
17 + -1a = -4 + a + -1a

Combine like terms: a + -1a = 0
17 + -1a = -4 + 0
17 + -1a = -4

Add '-17' to each side of the equation.
17 + -17 + -1a = -4 + -17

Combine like terms: 17 + -17 = 0
0 + -1a = -4 + -17
-1a = -4 + -17

Combine like terms: -4 + -17 = -21
-1a = -21

Divide each side by '-1'.
a = 21

Simplifying
a = 21

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