(21X+13)+2(6X+1)=180

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Solution for (21X+13)+2(6X+1)=180 equation: 


Simplifying
(21X + 13) + 2(6X + 1) = 180

Reorder the terms:
(13 + 21X) + 2(6X + 1) = 180

Remove parenthesis around (13 + 21X)
13 + 21X + 2(6X + 1) = 180

Reorder the terms:
13 + 21X + 2(1 + 6X) = 180
13 + 21X + (1 * 2 + 6X * 2) = 180
13 + 21X + (2 + 12X) = 180

Reorder the terms:
13 + 2 + 21X + 12X = 180

Combine like terms: 13 + 2 = 15
15 + 21X + 12X = 180

Combine like terms: 21X + 12X = 33X
15 + 33X = 180

Solving
15 + 33X = 180

Solving for variable 'X'.

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

Add '-15' to each side of the equation.
15 + -15 + 33X = 180 + -15

Combine like terms: 15 + -15 = 0
0 + 33X = 180 + -15
33X = 180 + -15

Combine like terms: 180 + -15 = 165
33X = 165

Divide each side by '33'.
X = 5

Simplifying
X = 5

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