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Simplifying 3x2 + 7y2 = 21 Solving 3x2 + 7y2 = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7y2' to each side of the equation. 3x2 + 7y2 + -7y2 = 21 + -7y2 Combine like terms: 7y2 + -7y2 = 0 3x2 + 0 = 21 + -7y2 3x2 = 21 + -7y2 Divide each side by '3'. x2 = 7 + -2.333333333y2 Simplifying x2 = 7 + -2.333333333y2 Reorder the terms: -7 + x2 + 2.333333333y2 = 7 + -2.333333333y2 + -7 + 2.333333333y2 Reorder the terms: -7 + x2 + 2.333333333y2 = 7 + -7 + -2.333333333y2 + 2.333333333y2 Combine like terms: 7 + -7 = 0 -7 + x2 + 2.333333333y2 = 0 + -2.333333333y2 + 2.333333333y2 -7 + x2 + 2.333333333y2 = -2.333333333y2 + 2.333333333y2 Combine like terms: -2.333333333y2 + 2.333333333y2 = 0.000000000 -7 + x2 + 2.333333333y2 = 0.000000000 The solution to this equation could not be determined.
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