(.03X)+(.07X)=75(.04)

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Solution for (.03X)+(.07X)=75(.04) equation: 


Simplifying
(0.03X) + (0.07X) = 75(0.04)

Combine like terms: (0.03X) + (0.07X) = 0.1X
0.1X = 75(0.04)

Multiply 75 * 0.04
0.1X = 3

Solving
0.1X = 3

Solving for variable 'X'.

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

Divide each side by '0.1'.
X = 30

Simplifying
X = 30

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