0.4*(x+x)=20

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Solution for 0.4*(x+x)=20 equation: 


Simplifying
0.4(x + x) = 20

Combine like terms: x + x = 2x
0.4(2x) = 20

Remove parenthesis around (2x)
0.4 * 2x = 20

Multiply 0.4 * 2
0.8x = 20

Solving
0.8x = 20

Solving for variable 'x'.

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

Divide each side by '0.8'.
x = 25

Simplifying
x = 25

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