30=-x+100

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Solution for 30=-x+100 equation:


Simplifying
30 = -1x + 100

Reorder the terms:
30 = 100 + -1x

Solving
30 = 100 + -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.
30 + x = 100 + -1x + x

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

Add '-30' to each side of the equation.
30 + -30 + x = 100 + -30

Combine like terms: 30 + -30 = 0
0 + x = 100 + -30
x = 100 + -30

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

Simplifying
x = 70

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