900+3x=2100

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Solution for 900+3x=2100 equation: 


Simplifying
900 + 3x = 2100

Solving
900 + 3x = 2100

Solving for variable 'x'.

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

Add '-900' to each side of the equation.
900 + -900 + 3x = 2100 + -900

Combine like terms: 900 + -900 = 0
0 + 3x = 2100 + -900
3x = 2100 + -900

Combine like terms: 2100 + -900 = 1200
3x = 1200

Divide each side by '3'.
x = 400

Simplifying
x = 400

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