90=90-(3x-8)

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Solution for 90=90-(3x-8) equation:


Simplifying
90 = 90 + -1(3x + -8)

Reorder the terms:
90 = 90 + -1(-8 + 3x)
90 = 90 + (-8 * -1 + 3x * -1)
90 = 90 + (8 + -3x)

Combine like terms: 90 + 8 = 98
90 = 98 + -3x

Solving
90 = 98 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
90 + 3x = 98 + -3x + 3x

Combine like terms: -3x + 3x = 0
90 + 3x = 98 + 0
90 + 3x = 98

Add '-90' to each side of the equation.
90 + -90 + 3x = 98 + -90

Combine like terms: 90 + -90 = 0
0 + 3x = 98 + -90
3x = 98 + -90

Combine like terms: 98 + -90 = 8
3x = 8

Divide each side by '3'.
x = 2.666666667

Simplifying
x = 2.666666667

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