105=7x-3(-x-5)

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Solution for 105=7x-3(-x-5) equation:


Simplifying
105 = 7x + -3(-1x + -5)

Reorder the terms:
105 = 7x + -3(-5 + -1x)
105 = 7x + (-5 * -3 + -1x * -3)
105 = 7x + (15 + 3x)

Reorder the terms:
105 = 15 + 7x + 3x

Combine like terms: 7x + 3x = 10x
105 = 15 + 10x

Solving
105 = 15 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
105 + -10x = 15 + 10x + -10x

Combine like terms: 10x + -10x = 0
105 + -10x = 15 + 0
105 + -10x = 15

Add '-105' to each side of the equation.
105 + -105 + -10x = 15 + -105

Combine like terms: 105 + -105 = 0
0 + -10x = 15 + -105
-10x = 15 + -105

Combine like terms: 15 + -105 = -90
-10x = -90

Divide each side by '-10'.
x = 9

Simplifying
x = 9

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