9-2[3x+7]=13

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Solution for 9-2[3x+7]=13 equation:


Simplifying
9 + -2[3x + 7] = 13

Reorder the terms:
9 + -2[7 + 3x] = 13
9 + [7 * -2 + 3x * -2] = 13
9 + [-14 + -6x] = 13

Combine like terms: 9 + -14 = -5
-5 + -6x = 13

Solving
-5 + -6x = 13

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + -6x = 13 + 5

Combine like terms: -5 + 5 = 0
0 + -6x = 13 + 5
-6x = 13 + 5

Combine like terms: 13 + 5 = 18
-6x = 18

Divide each side by '-6'.
x = -3

Simplifying
x = -3

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