(42-x)+x-x+(20-x)+(16-x)=70

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Solution for (42-x)+x-x+(20-x)+(16-x)=70 equation:


Simplifying
(42 + -1x) + x + -1x + (20 + -1x) + (16 + -1x) = 70

Remove parenthesis around (42 + -1x)
42 + -1x + x + -1x + (20 + -1x) + (16 + -1x) = 70

Remove parenthesis around (20 + -1x)
42 + -1x + x + -1x + 20 + -1x + (16 + -1x) = 70

Remove parenthesis around (16 + -1x)
42 + -1x + x + -1x + 20 + -1x + 16 + -1x = 70

Reorder the terms:
42 + 20 + 16 + -1x + x + -1x + -1x + -1x = 70

Combine like terms: 42 + 20 = 62
62 + 16 + -1x + x + -1x + -1x + -1x = 70

Combine like terms: 62 + 16 = 78
78 + -1x + x + -1x + -1x + -1x = 70

Combine like terms: -1x + x = 0
78 + 0 + -1x + -1x + -1x = 70
78 + -1x + -1x + -1x = 70

Combine like terms: -1x + -1x = -2x
78 + -2x + -1x = 70

Combine like terms: -2x + -1x = -3x
78 + -3x = 70

Solving
78 + -3x = 70

Solving for variable 'x'.

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

Add '-78' to each side of the equation.
78 + -78 + -3x = 70 + -78

Combine like terms: 78 + -78 = 0
0 + -3x = 70 + -78
-3x = 70 + -78

Combine like terms: 70 + -78 = -8
-3x = -8

Divide each side by '-3'.
x = 2.666666667

Simplifying
x = 2.666666667

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