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Simplifying 4x(x + -7) = 2x(2x + -13) + -10 Reorder the terms: 4x(-7 + x) = 2x(2x + -13) + -10 (-7 * 4x + x * 4x) = 2x(2x + -13) + -10 (-28x + 4x2) = 2x(2x + -13) + -10 Reorder the terms: -28x + 4x2 = 2x(-13 + 2x) + -10 -28x + 4x2 = (-13 * 2x + 2x * 2x) + -10 -28x + 4x2 = (-26x + 4x2) + -10 Reorder the terms: -28x + 4x2 = -10 + -26x + 4x2 Add '-4x2' to each side of the equation. -28x + 4x2 + -4x2 = -10 + -26x + 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 -28x + 0 = -10 + -26x + 4x2 + -4x2 -28x = -10 + -26x + 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 -28x = -10 + -26x + 0 -28x = -10 + -26x Solving -28x = -10 + -26x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '26x' to each side of the equation. -28x + 26x = -10 + -26x + 26x Combine like terms: -28x + 26x = -2x -2x = -10 + -26x + 26x Combine like terms: -26x + 26x = 0 -2x = -10 + 0 -2x = -10 Divide each side by '-2'. x = 5 Simplifying x = 5
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