40=4[x-10]

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Solution for 40=4[x-10] equation: 


Simplifying
40 = 4[x + -10]

Reorder the terms:
40 = 4[-10 + x]
40 = [-10 * 4 + x * 4]
40 = [-40 + 4x]

Solving
40 = -40 + 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.
40 + -4x = -40 + 4x + -4x

Combine like terms: 4x + -4x = 0
40 + -4x = -40 + 0
40 + -4x = -40

Add '-40' to each side of the equation.
40 + -40 + -4x = -40 + -40

Combine like terms: 40 + -40 = 0
0 + -4x = -40 + -40
-4x = -40 + -40

Combine like terms: -40 + -40 = -80
-4x = -80

Divide each side by '-4'.
x = 20

Simplifying
x = 20

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