7=3(x-1)+(x-1)

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Solution for 7=3(x-1)+(x-1) equation:


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

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

Reorder the terms:
7 = -3 + 3x + (-1 + x)

Remove parenthesis around (-1 + x)
7 = -3 + 3x + -1 + x

Reorder the terms:
7 = -3 + -1 + 3x + x

Combine like terms: -3 + -1 = -4
7 = -4 + 3x + x

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

Solving
7 = -4 + 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.
7 + -4x = -4 + 4x + -4x

Combine like terms: 4x + -4x = 0
7 + -4x = -4 + 0
7 + -4x = -4

Add '-7' to each side of the equation.
7 + -7 + -4x = -4 + -7

Combine like terms: 7 + -7 = 0
0 + -4x = -4 + -7
-4x = -4 + -7

Combine like terms: -4 + -7 = -11
-4x = -11

Divide each side by '-4'.
x = 2.75

Simplifying
x = 2.75

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