(2x-11)+(x+4)=21

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Solution for (2x-11)+(x+4)=21 equation:


Simplifying
(2x + -11) + (x + 4) = 21

Reorder the terms:
(-11 + 2x) + (x + 4) = 21

Remove parenthesis around (-11 + 2x)
-11 + 2x + (x + 4) = 21

Reorder the terms:
-11 + 2x + (4 + x) = 21

Remove parenthesis around (4 + x)
-11 + 2x + 4 + x = 21

Reorder the terms:
-11 + 4 + 2x + x = 21

Combine like terms: -11 + 4 = -7
-7 + 2x + x = 21

Combine like terms: 2x + x = 3x
-7 + 3x = 21

Solving
-7 + 3x = 21

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 3x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 3x = 21 + 7
3x = 21 + 7

Combine like terms: 21 + 7 = 28
3x = 28

Divide each side by '3'.
x = 9.333333333

Simplifying
x = 9.333333333

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