21x+20-17x=16

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Solution for 21x+20-17x=16 equation: 


Simplifying
21x + 20 + -17x = 16

Reorder the terms:
20 + 21x + -17x = 16

Combine like terms: 21x + -17x = 4x
20 + 4x = 16

Solving
20 + 4x = 16

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 4x = 16 + -20

Combine like terms: 20 + -20 = 0
0 + 4x = 16 + -20
4x = 16 + -20

Combine like terms: 16 + -20 = -4
4x = -4

Divide each side by '4'.
x = -1

Simplifying
x = -1

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