5[x+1]=20

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Solution for 5[x+1]=20 equation: 


Simplifying
5[x + 1] = 20

Reorder the terms:
5[1 + x] = 20
[1 * 5 + x * 5] = 20
[5 + 5x] = 20

Solving
5 + 5x = 20

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 5x = 20 + -5

Combine like terms: 5 + -5 = 0
0 + 5x = 20 + -5
5x = 20 + -5

Combine like terms: 20 + -5 = 15
5x = 15

Divide each side by '5'.
x = 3

Simplifying
x = 3

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