.40x+.70(12-x)=.50(12)

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Solution for .40x+.70(12-x)=.50(12) equation:


Simplifying
0.40x + 0.70(12 + -1x) = 0.50(12)
0.40x + (12 * 0.70 + -1x * 0.70) = 0.50(12)
0.40x + (8.4 + -0.7x) = 0.50(12)

Reorder the terms:
8.4 + 0.40x + -0.7x = 0.50(12)

Combine like terms: 0.40x + -0.7x = -0.3x
8.4 + -0.3x = 0.50(12)

Multiply 0.50 * 12
8.4 + -0.3x = 6

Solving
8.4 + -0.3x = 6

Solving for variable 'x'.

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

Add '-8.4' to each side of the equation.
8.4 + -8.4 + -0.3x = 6 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + -0.3x = 6 + -8.4
-0.3x = 6 + -8.4

Combine like terms: 6 + -8.4 = -2.4
-0.3x = -2.4

Divide each side by '-0.3'.
x = 8

Simplifying
x = 8

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