.05x+.03(1200-1x)=42

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Solution for .05x+.03(1200-1x)=42 equation:


Simplifying
0.05x + 0.03(1200 + -1x) = 42
0.05x + (1200 * 0.03 + -1x * 0.03) = 42
0.05x + (36 + -0.03x) = 42

Reorder the terms:
36 + 0.05x + -0.03x = 42

Combine like terms: 0.05x + -0.03x = 0.02x
36 + 0.02x = 42

Solving
36 + 0.02x = 42

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + 0.02x = 42 + -36

Combine like terms: 36 + -36 = 0
0 + 0.02x = 42 + -36
0.02x = 42 + -36

Combine like terms: 42 + -36 = 6
0.02x = 6

Divide each side by '0.02'.
x = 300

Simplifying
x = 300

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