x+3x-1+4x+2=81

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Solution for x+3x-1+4x+2=81 equation:


Simplifying
x + 3x + -1 + 4x + 2 = 81

Reorder the terms:
-1 + 2 + x + 3x + 4x = 81

Combine like terms: -1 + 2 = 1
1 + x + 3x + 4x = 81

Combine like terms: x + 3x = 4x
1 + 4x + 4x = 81

Combine like terms: 4x + 4x = 8x
1 + 8x = 81

Solving
1 + 8x = 81

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 + 8x = 81 + -1

Combine like terms: 1 + -1 = 0
0 + 8x = 81 + -1
8x = 81 + -1

Combine like terms: 81 + -1 = 80
8x = 80

Divide each side by '8'.
x = 10

Simplifying
x = 10

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