3X-4(-3X-7)=13

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Solution for 3X-4(-3X-7)=13 equation: 


Simplifying
3X + -4(-3X + -7) = 13

Reorder the terms:
3X + -4(-7 + -3X) = 13
3X + (-7 * -4 + -3X * -4) = 13
3X + (28 + 12X) = 13

Reorder the terms:
28 + 3X + 12X = 13

Combine like terms: 3X + 12X = 15X
28 + 15X = 13

Solving
28 + 15X = 13

Solving for variable 'X'.

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

Add '-28' to each side of the equation.
28 + -28 + 15X = 13 + -28

Combine like terms: 28 + -28 = 0
0 + 15X = 13 + -28
15X = 13 + -28

Combine like terms: 13 + -28 = -15
15X = -15

Divide each side by '15'.
X = -1

Simplifying
X = -1

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