(7x-3y)-(11x-3y)=15-21

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Solution for (7x-3y)-(11x-3y)=15-21 equation: 


Simplifying
(7x + -3y) + -1(11x + -3y) = 15 + -21

Remove parenthesis around (7x + -3y)
7x + -3y + -1(11x + -3y) = 15 + -21
7x + -3y + (11x * -1 + -3y * -1) = 15 + -21
7x + -3y + (-11x + 3y) = 15 + -21

Reorder the terms:
7x + -11x + -3y + 3y = 15 + -21

Combine like terms: 7x + -11x = -4x
-4x + -3y + 3y = 15 + -21

Combine like terms: -3y + 3y = 0
-4x + 0 = 15 + -21
-4x = 15 + -21

Combine like terms: 15 + -21 = -6
-4x = -6

Solving
-4x = -6

Solving for variable 'x'.

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

Divide each side by '-4'.
x = 1.5

Simplifying
x = 1.5

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