100=70+x

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Solution for 100=70+x equation:


Simplifying
100 = 70 + x

Solving
100 = 70 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
100 + -1x = 70 + x + -1x

Combine like terms: x + -1x = 0
100 + -1x = 70 + 0
100 + -1x = 70

Add '-100' to each side of the equation.
100 + -100 + -1x = 70 + -100

Combine like terms: 100 + -100 = 0
0 + -1x = 70 + -100
-1x = 70 + -100

Combine like terms: 70 + -100 = -30
-1x = -30

Divide each side by '-1'.
x = 30

Simplifying
x = 30

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