4(x+5)+5=21-x

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Solution for 4(x+5)+5=21-x equation:


Simplifying
4(x + 5) + 5 = 21 + -1x

Reorder the terms:
4(5 + x) + 5 = 21 + -1x
(5 * 4 + x * 4) + 5 = 21 + -1x
(20 + 4x) + 5 = 21 + -1x

Reorder the terms:
20 + 5 + 4x = 21 + -1x

Combine like terms: 20 + 5 = 25
25 + 4x = 21 + -1x

Solving
25 + 4x = 21 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
25 + 4x + x = 21 + -1x + x

Combine like terms: 4x + x = 5x
25 + 5x = 21 + -1x + x

Combine like terms: -1x + x = 0
25 + 5x = 21 + 0
25 + 5x = 21

Add '-25' to each side of the equation.
25 + -25 + 5x = 21 + -25

Combine like terms: 25 + -25 = 0
0 + 5x = 21 + -25
5x = 21 + -25

Combine like terms: 21 + -25 = -4
5x = -4

Divide each side by '5'.
x = -0.8

Simplifying
x = -0.8

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