3x+8x-121=77

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Solution for 3x+8x-121=77 equation:


Simplifying
3x + 8x + -121 = 77

Reorder the terms:
-121 + 3x + 8x = 77

Combine like terms: 3x + 8x = 11x
-121 + 11x = 77

Solving
-121 + 11x = 77

Solving for variable 'x'.

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

Add '121' to each side of the equation.
-121 + 121 + 11x = 77 + 121

Combine like terms: -121 + 121 = 0
0 + 11x = 77 + 121
11x = 77 + 121

Combine like terms: 77 + 121 = 198
11x = 198

Divide each side by '11'.
x = 18

Simplifying
x = 18

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