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Simplifying 2x2 + 7 = 2x2 + -1x + -4 Reorder the terms: 7 + 2x2 = 2x2 + -1x + -4 Reorder the terms: 7 + 2x2 = -4 + -1x + 2x2 Add '-2x2' to each side of the equation. 7 + 2x2 + -2x2 = -4 + -1x + 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 7 + 0 = -4 + -1x + 2x2 + -2x2 7 = -4 + -1x + 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 7 = -4 + -1x + 0 7 = -4 + -1x Solving 7 = -4 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 7 + x = -4 + -1x + x Combine like terms: -1x + x = 0 7 + x = -4 + 0 7 + x = -4 Add '-7' to each side of the equation. 7 + -7 + x = -4 + -7 Combine like terms: 7 + -7 = 0 0 + x = -4 + -7 x = -4 + -7 Combine like terms: -4 + -7 = -11 x = -11 Simplifying x = -11
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