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Simplifying 3x + y = 7x + -2y Solving 3x + y = 7x + -2y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 3x + -7x + y = 7x + -7x + -2y Combine like terms: 3x + -7x = -4x -4x + y = 7x + -7x + -2y Combine like terms: 7x + -7x = 0 -4x + y = 0 + -2y -4x + y = -2y Add '-1y' to each side of the equation. -4x + y + -1y = -2y + -1y Combine like terms: y + -1y = 0 -4x + 0 = -2y + -1y -4x = -2y + -1y Combine like terms: -2y + -1y = -3y -4x = -3y Divide each side by '-4'. x = 0.75y Simplifying x = 0.75y
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