680=400+(.04)x

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Solution for 680=400+(.04)x equation:


Simplifying
680 = 400 + (0.04) * x

Solving
680 = 400 + 0.04x

Solving for variable 'x'.

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

Add '-0.04x' to each side of the equation.
680 + -0.04x = 400 + 0.04x + -0.04x

Combine like terms: 0.04x + -0.04x = 0.00
680 + -0.04x = 400 + 0.00
680 + -0.04x = 400

Add '-680' to each side of the equation.
680 + -680 + -0.04x = 400 + -680

Combine like terms: 680 + -680 = 0
0 + -0.04x = 400 + -680
-0.04x = 400 + -680

Combine like terms: 400 + -680 = -280
-0.04x = -280

Divide each side by '-0.04'.
x = 7000

Simplifying
x = 7000

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