680=400+20x

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Solution for 680=400+20x equation:


Simplifying
680 = 400 + 20x

Solving
680 = 400 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
680 + -20x = 400 + 20x + -20x

Combine like terms: 20x + -20x = 0
680 + -20x = 400 + 0
680 + -20x = 400

Add '-680' to each side of the equation.
680 + -680 + -20x = 400 + -680

Combine like terms: 680 + -680 = 0
0 + -20x = 400 + -680
-20x = 400 + -680

Combine like terms: 400 + -680 = -280
-20x = -280

Divide each side by '-20'.
x = 14

Simplifying
x = 14

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