3x-(2x+1)=21

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Solution for 3x-(2x+1)=21 equation:


Simplifying
3x + -1(2x + 1) = 21

Reorder the terms:
3x + -1(1 + 2x) = 21
3x + (1 * -1 + 2x * -1) = 21
3x + (-1 + -2x) = 21

Reorder the terms:
-1 + 3x + -2x = 21

Combine like terms: 3x + -2x = 1x
-1 + 1x = 21

Solving
-1 + 1x = 21

Solving for variable 'x'.

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

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

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

Combine like terms: 21 + 1 = 22
1x = 22

Divide each side by '1'.
x = 22

Simplifying
x = 22

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