140=2(7x)+2(3x)

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Solution for 140=2(7x)+2(3x) equation: 


Simplifying
140 = 2(7x) + 2(3x)

Remove parenthesis around (7x)
140 = 2 * 7x + 2(3x)

Multiply 2 * 7
140 = 14x + 2(3x)

Remove parenthesis around (3x)
140 = 14x + 2 * 3x

Multiply 2 * 3
140 = 14x + 6x

Combine like terms: 14x + 6x = 20x
140 = 20x

Solving
140 = 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
140 + -20x = 20x + -20x

Combine like terms: 20x + -20x = 0
140 + -20x = 0

Add '-140' to each side of the equation.
140 + -140 + -20x = 0 + -140

Combine like terms: 140 + -140 = 0
0 + -20x = 0 + -140
-20x = 0 + -140

Combine like terms: 0 + -140 = -140
-20x = -140

Divide each side by '-20'.
x = 7

Simplifying
x = 7

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