2.1X+3.5(40-X)+2(20)=2.72(X+40-X+20)

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Solution for 2.1X+3.5(40-X)+2(20)=2.72(X+40-X+20) equation:


Simplifying
2.1X + 3.5(40 + -1X) + 2(20) = 2.72(X + 40 + -1X + 20)
2.1X + (40 * 3.5 + -1X * 3.5) + 2(20) = 2.72(X + 40 + -1X + 20)
2.1X + (140 + -3.5X) + 2(20) = 2.72(X + 40 + -1X + 20)

Multiply 2 * 20
2.1X + 140 + -3.5X + 40 = 2.72(X + 40 + -1X + 20)

Reorder the terms:
140 + 40 + 2.1X + -3.5X = 2.72(X + 40 + -1X + 20)

Combine like terms: 140 + 40 = 180
180 + 2.1X + -3.5X = 2.72(X + 40 + -1X + 20)

Combine like terms: 2.1X + -3.5X = -1.4X
180 + -1.4X = 2.72(X + 40 + -1X + 20)

Reorder the terms:
180 + -1.4X = 2.72(40 + 20 + X + -1X)

Combine like terms: 40 + 20 = 60
180 + -1.4X = 2.72(60 + X + -1X)

Combine like terms: X + -1X = 0
180 + -1.4X = 2.72(60 + 0)
180 + -1.4X = 2.72(60)

Multiply 2.72 * 60
180 + -1.4X = 163.2

Solving
180 + -1.4X = 163.2

Solving for variable 'X'.

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

Add '-180' to each side of the equation.
180 + -180 + -1.4X = 163.2 + -180

Combine like terms: 180 + -180 = 0
0 + -1.4X = 163.2 + -180
-1.4X = 163.2 + -180

Combine like terms: 163.2 + -180 = -16.8
-1.4X = -16.8

Divide each side by '-1.4'.
X = 12

Simplifying
X = 12

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