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Simplifying 7(3 + -1x) + x = 5 + -3x (3 * 7 + -1x * 7) + x = 5 + -3x (21 + -7x) + x = 5 + -3x Combine like terms: -7x + x = -6x 21 + -6x = 5 + -3x Solving 21 + -6x = 5 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 21 + -6x + 3x = 5 + -3x + 3x Combine like terms: -6x + 3x = -3x 21 + -3x = 5 + -3x + 3x Combine like terms: -3x + 3x = 0 21 + -3x = 5 + 0 21 + -3x = 5 Add '-21' to each side of the equation. 21 + -21 + -3x = 5 + -21 Combine like terms: 21 + -21 = 0 0 + -3x = 5 + -21 -3x = 5 + -21 Combine like terms: 5 + -21 = -16 -3x = -16 Divide each side by '-3'. x = 5.333333333 Simplifying x = 5.333333333
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