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Simplifying x4 + -2x3 + x2 = x4 + -2x3 + x2 Reorder the terms: x2 + -2x3 + x4 = x4 + -2x3 + x2 Reorder the terms: x2 + -2x3 + x4 = x2 + -2x3 + x4 Add '-1x2' to each side of the equation. x2 + -2x3 + -1x2 + x4 = x2 + -2x3 + -1x2 + x4 Reorder the terms: x2 + -1x2 + -2x3 + x4 = x2 + -2x3 + -1x2 + x4 Combine like terms: x2 + -1x2 = 0 0 + -2x3 + x4 = x2 + -2x3 + -1x2 + x4 -2x3 + x4 = x2 + -2x3 + -1x2 + x4 Reorder the terms: -2x3 + x4 = x2 + -1x2 + -2x3 + x4 Combine like terms: x2 + -1x2 = 0 -2x3 + x4 = 0 + -2x3 + x4 -2x3 + x4 = -2x3 + x4 Add '2x3' to each side of the equation. -2x3 + 2x3 + x4 = -2x3 + 2x3 + x4 Combine like terms: -2x3 + 2x3 = 0 0 + x4 = -2x3 + 2x3 + x4 x4 = -2x3 + 2x3 + x4 Combine like terms: -2x3 + 2x3 = 0 x4 = 0 + x4 x4 = x4 Add '-1x4' to each side of the equation. x4 + -1x4 = x4 + -1x4 Combine like terms: x4 + -1x4 = 0 0 = x4 + -1x4 Combine like terms: x4 + -1x4 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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