7x-(3x+11)=21

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Solution for 7x-(3x+11)=21 equation:


Simplifying
7x + -1(3x + 11) = 21

Reorder the terms:
7x + -1(11 + 3x) = 21
7x + (11 * -1 + 3x * -1) = 21
7x + (-11 + -3x) = 21

Reorder the terms:
-11 + 7x + -3x = 21

Combine like terms: 7x + -3x = 4x
-11 + 4x = 21

Solving
-11 + 4x = 21

Solving for variable 'x'.

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

Add '11' to each side of the equation.
-11 + 11 + 4x = 21 + 11

Combine like terms: -11 + 11 = 0
0 + 4x = 21 + 11
4x = 21 + 11

Combine like terms: 21 + 11 = 32
4x = 32

Divide each side by '4'.
x = 8

Simplifying
x = 8

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