x+(x-1)=77

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Solution for x+(x-1)=77 equation:


Simplifying
x + (x + -1) = 77

Reorder the terms:
x + (-1 + x) = 77

Remove parenthesis around (-1 + x)
x + -1 + x = 77

Reorder the terms:
-1 + x + x = 77

Combine like terms: x + x = 2x
-1 + 2x = 77

Solving
-1 + 2x = 77

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 2x = 77 + 1

Combine like terms: -1 + 1 = 0
0 + 2x = 77 + 1
2x = 77 + 1

Combine like terms: 77 + 1 = 78
2x = 78

Divide each side by '2'.
x = 39

Simplifying
x = 39

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