21+3(x-4)=(x+5)

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Solution for 21+3(x-4)=(x+5) equation:


Simplifying
21 + 3(x + -4) = (x + 5)

Reorder the terms:
21 + 3(-4 + x) = (x + 5)
21 + (-4 * 3 + x * 3) = (x + 5)
21 + (-12 + 3x) = (x + 5)

Combine like terms: 21 + -12 = 9
9 + 3x = (x + 5)

Reorder the terms:
9 + 3x = (5 + x)

Remove parenthesis around (5 + x)
9 + 3x = 5 + x

Solving
9 + 3x = 5 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
9 + 3x + -1x = 5 + x + -1x

Combine like terms: 3x + -1x = 2x
9 + 2x = 5 + x + -1x

Combine like terms: x + -1x = 0
9 + 2x = 5 + 0
9 + 2x = 5

Add '-9' to each side of the equation.
9 + -9 + 2x = 5 + -9

Combine like terms: 9 + -9 = 0
0 + 2x = 5 + -9
2x = 5 + -9

Combine like terms: 5 + -9 = -4
2x = -4

Divide each side by '2'.
x = -2

Simplifying
x = -2

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