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Simplifying 8x + -7y = -21 Solving 8x + -7y = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7y' to each side of the equation. 8x + -7y + 7y = -21 + 7y Combine like terms: -7y + 7y = 0 8x + 0 = -21 + 7y 8x = -21 + 7y Divide each side by '8'. x = -2.625 + 0.875y Simplifying x = -2.625 + 0.875y
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