(1500-x)-1200-y=3x-y

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Solution for (1500-x)-1200-y=3x-y equation:


Simplifying
(1500 + -1x) + -1200 + -1y = 3x + -1y

Remove parenthesis around (1500 + -1x)
1500 + -1x + -1200 + -1y = 3x + -1y

Reorder the terms:
1500 + -1200 + -1x + -1y = 3x + -1y

Combine like terms: 1500 + -1200 = 300
300 + -1x + -1y = 3x + -1y

Add 'y' to each side of the equation.
300 + -1x + -1y + y = 3x + -1y + y

Combine like terms: -1y + y = 0
300 + -1x + 0 = 3x + -1y + y
300 + -1x = 3x + -1y + y

Combine like terms: -1y + y = 0
300 + -1x = 3x + 0
300 + -1x = 3x

Solving
300 + -1x = 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
300 + -1x + -3x = 3x + -3x

Combine like terms: -1x + -3x = -4x
300 + -4x = 3x + -3x

Combine like terms: 3x + -3x = 0
300 + -4x = 0

Add '-300' to each side of the equation.
300 + -300 + -4x = 0 + -300

Combine like terms: 300 + -300 = 0
0 + -4x = 0 + -300
-4x = 0 + -300

Combine like terms: 0 + -300 = -300
-4x = -300

Divide each side by '-4'.
x = 75

Simplifying
x = 75

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