258=145-x

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Solution for 258=145-x equation:


Simplifying
258 = 145 + -1x

Solving
258 = 145 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
258 + x = 145 + -1x + x

Combine like terms: -1x + x = 0
258 + x = 145 + 0
258 + x = 145

Add '-258' to each side of the equation.
258 + -258 + x = 145 + -258

Combine like terms: 258 + -258 = 0
0 + x = 145 + -258
x = 145 + -258

Combine like terms: 145 + -258 = -113
x = -113

Simplifying
x = -113

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