4x+100=90

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Solution for 4x+100=90 equation: 


Simplifying
4x + 100 = 90

Reorder the terms:
100 + 4x = 90

Solving
100 + 4x = 90

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 + 4x = 90 + -100

Combine like terms: 100 + -100 = 0
0 + 4x = 90 + -100
4x = 90 + -100

Combine like terms: 90 + -100 = -10
4x = -10

Divide each side by '4'.
x = -2.5

Simplifying
x = -2.5

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