90-5(x+1)=4(x+1)

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Solution for 90-5(x+1)=4(x+1) equation:


Simplifying
90 + -5(x + 1) = 4(x + 1)

Reorder the terms:
90 + -5(1 + x) = 4(x + 1)
90 + (1 * -5 + x * -5) = 4(x + 1)
90 + (-5 + -5x) = 4(x + 1)

Combine like terms: 90 + -5 = 85
85 + -5x = 4(x + 1)

Reorder the terms:
85 + -5x = 4(1 + x)
85 + -5x = (1 * 4 + x * 4)
85 + -5x = (4 + 4x)

Solving
85 + -5x = 4 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
85 + -5x + -4x = 4 + 4x + -4x

Combine like terms: -5x + -4x = -9x
85 + -9x = 4 + 4x + -4x

Combine like terms: 4x + -4x = 0
85 + -9x = 4 + 0
85 + -9x = 4

Add '-85' to each side of the equation.
85 + -85 + -9x = 4 + -85

Combine like terms: 85 + -85 = 0
0 + -9x = 4 + -85
-9x = 4 + -85

Combine like terms: 4 + -85 = -81
-9x = -81

Divide each side by '-9'.
x = 9

Simplifying
x = 9

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