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Simplifying 402 = 4x + 3(x + -20) Reorder the terms: 402 = 4x + 3(-20 + x) 402 = 4x + (-20 * 3 + x * 3) 402 = 4x + (-60 + 3x) Reorder the terms: 402 = -60 + 4x + 3x Combine like terms: 4x + 3x = 7x 402 = -60 + 7x Solving 402 = -60 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 402 + -7x = -60 + 7x + -7x Combine like terms: 7x + -7x = 0 402 + -7x = -60 + 0 402 + -7x = -60 Add '-402' to each side of the equation. 402 + -402 + -7x = -60 + -402 Combine like terms: 402 + -402 = 0 0 + -7x = -60 + -402 -7x = -60 + -402 Combine like terms: -60 + -402 = -462 -7x = -462 Divide each side by '-7'. x = 66 Simplifying x = 66
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