17=a-4.2

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Solution for 17=a-4.2 equation:


Simplifying
17 = a + -4.2

Reorder the terms:
17 = -4.2 + a

Solving
17 = -4.2 + 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 = -4.2 + a + -1a

Combine like terms: a + -1a = 0
17 + -1a = -4.2 + 0
17 + -1a = -4.2

Add '-17' to each side of the equation.
17 + -17 + -1a = -4.2 + -17

Combine like terms: 17 + -17 = 0
0 + -1a = -4.2 + -17
-1a = -4.2 + -17

Combine like terms: -4.2 + -17 = -21.2
-1a = -21.2

Divide each side by '-1'.
a = 21.2

Simplifying
a = 21.2

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