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Simplifying 5x + 21(X + -3) = 145 Reorder the terms: 5x + 21(-3 + X) = 145 5x + (-3 * 21 + X * 21) = 145 5x + (-63 + 21X) = 145 Reorder the terms: -63 + 21X + 5x = 145 Solving -63 + 21X + 5x = 145 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '63' to each side of the equation. -63 + 21X + 63 + 5x = 145 + 63 Reorder the terms: -63 + 63 + 21X + 5x = 145 + 63 Combine like terms: -63 + 63 = 0 0 + 21X + 5x = 145 + 63 21X + 5x = 145 + 63 Combine like terms: 145 + 63 = 208 21X + 5x = 208 Add '-5x' to each side of the equation. 21X + 5x + -5x = 208 + -5x Combine like terms: 5x + -5x = 0 21X + 0 = 208 + -5x 21X = 208 + -5x Divide each side by '21'. X = 9.904761905 + -0.2380952381x Simplifying X = 9.904761905 + -0.2380952381x
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