-13=6X+7(X-13)

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Solution for -13=6X+7(X-13) equation:


Simplifying
-13 = 6X + 7(X + -13)

Reorder the terms:
-13 = 6X + 7(-13 + X)
-13 = 6X + (-13 * 7 + X * 7)
-13 = 6X + (-91 + 7X)

Reorder the terms:
-13 = -91 + 6X + 7X

Combine like terms: 6X + 7X = 13X
-13 = -91 + 13X

Solving
-13 = -91 + 13X

Solving for variable 'X'.

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

Add '-13X' to each side of the equation.
-13 + -13X = -91 + 13X + -13X

Combine like terms: 13X + -13X = 0
-13 + -13X = -91 + 0
-13 + -13X = -91

Add '13' to each side of the equation.
-13 + 13 + -13X = -91 + 13

Combine like terms: -13 + 13 = 0
0 + -13X = -91 + 13
-13X = -91 + 13

Combine like terms: -91 + 13 = -78
-13X = -78

Divide each side by '-13'.
X = 6

Simplifying
X = 6

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