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Simplifying -1x + -3y = 7 Solving -1x + -3y = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3y' to each side of the equation. -1x + -3y + 3y = 7 + 3y Combine like terms: -3y + 3y = 0 -1x + 0 = 7 + 3y -1x = 7 + 3y Divide each side by '-1'. x = -7 + -3y Simplifying x = -7 + -3y
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