3x+1+5x-40+4x-21=180

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Solution for 3x+1+5x-40+4x-21=180 equation:


Simplifying
3x + 1 + 5x + -40 + 4x + -21 = 180

Reorder the terms:
1 + -40 + -21 + 3x + 5x + 4x = 180

Combine like terms: 1 + -40 = -39
-39 + -21 + 3x + 5x + 4x = 180

Combine like terms: -39 + -21 = -60
-60 + 3x + 5x + 4x = 180

Combine like terms: 3x + 5x = 8x
-60 + 8x + 4x = 180

Combine like terms: 8x + 4x = 12x
-60 + 12x = 180

Solving
-60 + 12x = 180

Solving for variable 'x'.

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

Add '60' to each side of the equation.
-60 + 60 + 12x = 180 + 60

Combine like terms: -60 + 60 = 0
0 + 12x = 180 + 60
12x = 180 + 60

Combine like terms: 180 + 60 = 240
12x = 240

Divide each side by '12'.
x = 20

Simplifying
x = 20

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