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Simplifying -2x + 8y = 21 Solving -2x + 8y = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8y' to each side of the equation. -2x + 8y + -8y = 21 + -8y Combine like terms: 8y + -8y = 0 -2x + 0 = 21 + -8y -2x = 21 + -8y Divide each side by '-2'. x = -10.5 + 4y Simplifying x = -10.5 + 4y
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