4x+3=21-(x+1)

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Solution for 4x+3=21-(x+1) equation:


Simplifying
4x + 3 = 21 + -1(x + 1)

Reorder the terms:
3 + 4x = 21 + -1(x + 1)

Reorder the terms:
3 + 4x = 21 + -1(1 + x)
3 + 4x = 21 + (1 * -1 + x * -1)
3 + 4x = 21 + (-1 + -1x)

Combine like terms: 21 + -1 = 20
3 + 4x = 20 + -1x

Solving
3 + 4x = 20 + -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.
3 + 4x + x = 20 + -1x + x

Combine like terms: 4x + x = 5x
3 + 5x = 20 + -1x + x

Combine like terms: -1x + x = 0
3 + 5x = 20 + 0
3 + 5x = 20

Add '-3' to each side of the equation.
3 + -3 + 5x = 20 + -3

Combine like terms: 3 + -3 = 0
0 + 5x = 20 + -3
5x = 20 + -3

Combine like terms: 20 + -3 = 17
5x = 17

Divide each side by '5'.
x = 3.4

Simplifying
x = 3.4

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