42=7x-(3x-8)-2

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Solution for 42=7x-(3x-8)-2 equation:


Simplifying
42 = 7x + -1(3x + -8) + -2

Reorder the terms:
42 = 7x + -1(-8 + 3x) + -2
42 = 7x + (-8 * -1 + 3x * -1) + -2
42 = 7x + (8 + -3x) + -2

Reorder the terms:
42 = 8 + -2 + 7x + -3x

Combine like terms: 8 + -2 = 6
42 = 6 + 7x + -3x

Combine like terms: 7x + -3x = 4x
42 = 6 + 4x

Solving
42 = 6 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
42 + -4x = 6 + 4x + -4x

Combine like terms: 4x + -4x = 0
42 + -4x = 6 + 0
42 + -4x = 6

Add '-42' to each side of the equation.
42 + -42 + -4x = 6 + -42

Combine like terms: 42 + -42 = 0
0 + -4x = 6 + -42
-4x = 6 + -42

Combine like terms: 6 + -42 = -36
-4x = -36

Divide each side by '-4'.
x = 9

Simplifying
x = 9

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