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Simplifying 3(x + 7) = 2(2 + -7) + x Reorder the terms: 3(7 + x) = 2(2 + -7) + x (7 * 3 + x * 3) = 2(2 + -7) + x (21 + 3x) = 2(2 + -7) + x Combine like terms: 2 + -7 = -5 21 + 3x = 2(-5) + x Multiply 2 * -5 21 + 3x = -10 + x Solving 21 + 3x = -10 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 21 + 3x + -1x = -10 + x + -1x Combine like terms: 3x + -1x = 2x 21 + 2x = -10 + x + -1x Combine like terms: x + -1x = 0 21 + 2x = -10 + 0 21 + 2x = -10 Add '-21' to each side of the equation. 21 + -21 + 2x = -10 + -21 Combine like terms: 21 + -21 = 0 0 + 2x = -10 + -21 2x = -10 + -21 Combine like terms: -10 + -21 = -31 2x = -31 Divide each side by '2'. x = -15.5 Simplifying x = -15.5
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