400-3x=142

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Solution for 400-3x=142 equation: 


Simplifying
400 + -3x = 142

Solving
400 + -3x = 142

Solving for variable 'x'.

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

Add '-400' to each side of the equation.
400 + -400 + -3x = 142 + -400

Combine like terms: 400 + -400 = 0
0 + -3x = 142 + -400
-3x = 142 + -400

Combine like terms: 142 + -400 = -258
-3x = -258

Divide each side by '-3'.
x = 86

Simplifying
x = 86

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