21x+17=80

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Solution for 21x+17=80 equation: 


Simplifying
21x + 17 = 80

Reorder the terms:
17 + 21x = 80

Solving
17 + 21x = 80

Solving for variable 'x'.

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

Add '-17' to each side of the equation.
17 + -17 + 21x = 80 + -17

Combine like terms: 17 + -17 = 0
0 + 21x = 80 + -17
21x = 80 + -17

Combine like terms: 80 + -17 = 63
21x = 63

Divide each side by '21'.
x = 3

Simplifying
x = 3

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