.21(12)=.15x(12)+.25y(12)

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Solution for .21(12)=.15x(12)+.25y(12) equation: 


Simplifying
0.21(12) = 0.15x(12) + 0.25y(12)

Multiply 0.21 * 12
2.52 = 0.15x(12) + 0.25y(12)

Reorder the terms for easier multiplication:
2.52 = 0.15 * 12x + 0.25y(12)

Multiply 0.15 * 12
2.52 = 1.8x + 0.25y(12)

Reorder the terms for easier multiplication:
2.52 = 1.8x + 0.25 * 12y

Multiply 0.25 * 12
2.52 = 1.8x + 3y

Solving
2.52 = 1.8x + 3y

Solving for variable 'x'.

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

Add '-1.8x' to each side of the equation.
2.52 + -1.8x = 1.8x + -1.8x + 3y

Combine like terms: 1.8x + -1.8x = 0.0
2.52 + -1.8x = 0.0 + 3y
2.52 + -1.8x = 3y

Add '-2.52' to each side of the equation.
2.52 + -2.52 + -1.8x = -2.52 + 3y

Combine like terms: 2.52 + -2.52 = 0.00
0.00 + -1.8x = -2.52 + 3y
-1.8x = -2.52 + 3y

Divide each side by '-1.8'.
x = 1.4 + -1.666666667y

Simplifying
x = 1.4 + -1.666666667y

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