x*900+(30-x)*1200=30*1000

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Solution for x*900+(30-x)*1200=30*1000 equation:


Simplifying
x * 900 + (30 + -1x) * 1200 = 30 * 1000

Reorder the terms for easier multiplication:
900x + (30 + -1x) * 1200 = 30 * 1000

Reorder the terms for easier multiplication:
900x + 1200(30 + -1x) = 30 * 1000
900x + (30 * 1200 + -1x * 1200) = 30 * 1000
900x + (36000 + -1200x) = 30 * 1000

Reorder the terms:
36000 + 900x + -1200x = 30 * 1000

Combine like terms: 900x + -1200x = -300x
36000 + -300x = 30 * 1000

Multiply 30 * 1000
36000 + -300x = 30000

Solving
36000 + -300x = 30000

Solving for variable 'x'.

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

Add '-36000' to each side of the equation.
36000 + -36000 + -300x = 30000 + -36000

Combine like terms: 36000 + -36000 = 0
0 + -300x = 30000 + -36000
-300x = 30000 + -36000

Combine like terms: 30000 + -36000 = -6000
-300x = -6000

Divide each side by '-300'.
x = 20

Simplifying
x = 20

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