3x+100=400

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Solution for 3x+100=400 equation: 


Simplifying
3x + 100 = 400

Reorder the terms:
100 + 3x = 400

Solving
100 + 3x = 400

Solving for variable 'x'.

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

Add '-100' to each side of the equation.
100 + -100 + 3x = 400 + -100

Combine like terms: 100 + -100 = 0
0 + 3x = 400 + -100
3x = 400 + -100

Combine like terms: 400 + -100 = 300
3x = 300

Divide each side by '3'.
x = 100

Simplifying
x = 100

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