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Simplifying 4x + 7y = -21 Solving 4x + 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. 4x + 7y + -7y = -21 + -7y Combine like terms: 7y + -7y = 0 4x + 0 = -21 + -7y 4x = -21 + -7y Divide each side by '4'. x = -5.25 + -1.75y Simplifying x = -5.25 + -1.75y
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