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Simplifying 2x * x + 40 = 2x(x + 5) Multiply x * x 2x2 + 40 = 2x(x + 5) Reorder the terms: 40 + 2x2 = 2x(x + 5) Reorder the terms: 40 + 2x2 = 2x(5 + x) 40 + 2x2 = (5 * 2x + x * 2x) 40 + 2x2 = (10x + 2x2) Add '-2x2' to each side of the equation. 40 + 2x2 + -2x2 = 10x + 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 40 + 0 = 10x + 2x2 + -2x2 40 = 10x + 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 40 = 10x + 0 40 = 10x Solving 40 = 10x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10x' to each side of the equation. 40 + -10x = 10x + -10x Combine like terms: 10x + -10x = 0 40 + -10x = 0 Add '-40' to each side of the equation. 40 + -40 + -10x = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -10x = 0 + -40 -10x = 0 + -40 Combine like terms: 0 + -40 = -40 -10x = -40 Divide each side by '-10'. x = 4 Simplifying x = 4
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