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Simplifying 21 = 6x + 7y Solving 21 = 6x + 7y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. 21 + -6x = 6x + -6x + 7y Combine like terms: 6x + -6x = 0 21 + -6x = 0 + 7y 21 + -6x = 7y Add '-21' to each side of the equation. 21 + -21 + -6x = -21 + 7y Combine like terms: 21 + -21 = 0 0 + -6x = -21 + 7y -6x = -21 + 7y Divide each side by '-6'. x = 3.5 + -1.166666667y Simplifying x = 3.5 + -1.166666667y
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