3-(2x+1)=21

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


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

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

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

Solving
2 + -2x = 21

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + -2x = 21 + -2

Combine like terms: 2 + -2 = 0
0 + -2x = 21 + -2
-2x = 21 + -2

Combine like terms: 21 + -2 = 19
-2x = 19

Divide each side by '-2'.
x = -9.5

Simplifying
x = -9.5

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