0.65x+.05(18-x)=.10(21)

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Solution for 0.65x+.05(18-x)=.10(21) equation: 


Simplifying
0.65x + 0.05(18 + -1x) = 0.10(21)
0.65x + (18 * 0.05 + -1x * 0.05) = 0.10(21)
0.65x + (0.9 + -0.05x) = 0.10(21)

Reorder the terms:
0.9 + 0.65x + -0.05x = 0.10(21)

Combine like terms: 0.65x + -0.05x = 0.6x
0.9 + 0.6x = 0.10(21)

Multiply 0.10 * 21
0.9 + 0.6x = 2.1

Solving
0.9 + 0.6x = 2.1

Solving for variable 'x'.

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

Add '-0.9' to each side of the equation.
0.9 + -0.9 + 0.6x = 2.1 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + 0.6x = 2.1 + -0.9
0.6x = 2.1 + -0.9

Combine like terms: 2.1 + -0.9 = 1.2
0.6x = 1.2

Divide each side by '0.6'.
x = 2

Simplifying
x = 2

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