7-(3x-2)=21

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Solution for 7-(3x-2)=21 equation:


Simplifying
7 + -1(3x + -2) = 21

Reorder the terms:
7 + -1(-2 + 3x) = 21
7 + (-2 * -1 + 3x * -1) = 21
7 + (2 + -3x) = 21

Combine like terms: 7 + 2 = 9
9 + -3x = 21

Solving
9 + -3x = 21

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + -3x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -3x = 21 + -9
-3x = 21 + -9

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

Divide each side by '-3'.
x = -4

Simplifying
x = -4

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