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Simplifying -7x + -2y = -21 Solving -7x + -2y = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2y' to each side of the equation. -7x + -2y + 2y = -21 + 2y Combine like terms: -2y + 2y = 0 -7x + 0 = -21 + 2y -7x = -21 + 2y Divide each side by '-7'. x = 3 + -0.2857142857y Simplifying x = 3 + -0.2857142857y
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