0.3x+0.7(20-x)=0.4(20)

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Solution for 0.3x+0.7(20-x)=0.4(20) equation:


Simplifying
0.3x + 0.7(20 + -1x) = 0.4(20)
0.3x + (20 * 0.7 + -1x * 0.7) = 0.4(20)
0.3x + (14 + -0.7x) = 0.4(20)

Reorder the terms:
14 + 0.3x + -0.7x = 0.4(20)

Combine like terms: 0.3x + -0.7x = -0.4x
14 + -0.4x = 0.4(20)

Multiply 0.4 * 20
14 + -0.4x = 8

Solving
14 + -0.4x = 8

Solving for variable 'x'.

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

Add '-14' to each side of the equation.
14 + -14 + -0.4x = 8 + -14

Combine like terms: 14 + -14 = 0
0 + -0.4x = 8 + -14
-0.4x = 8 + -14

Combine like terms: 8 + -14 = -6
-0.4x = -6

Divide each side by '-0.4'.
x = 15

Simplifying
x = 15

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