3000-x=900

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Solution for 3000-x=900 equation: 


Simplifying
3000 + -1x = 900

Solving
3000 + -1x = 900

Solving for variable 'x'.

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

Add '-3000' to each side of the equation.
3000 + -3000 + -1x = 900 + -3000

Combine like terms: 3000 + -3000 = 0
0 + -1x = 900 + -3000
-1x = 900 + -3000

Combine like terms: 900 + -3000 = -2100
-1x = -2100

Divide each side by '-1'.
x = 2100

Simplifying
x = 2100

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