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Simplifying 3x + 7y = x Solving 3x + 7y = x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 3x + -1x + 7y = x + -1x Combine like terms: 3x + -1x = 2x 2x + 7y = x + -1x Combine like terms: x + -1x = 0 2x + 7y = 0 Add '-7y' to each side of the equation. 2x + 7y + -7y = 0 + -7y Combine like terms: 7y + -7y = 0 2x + 0 = 0 + -7y 2x = 0 + -7y Remove the zero: 2x = -7y Divide each side by '2'. x = -3.5y Simplifying x = -3.5y
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