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Simplifying 5 + -7x = 86 + -28x Solving 5 + -7x = 86 + -28x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28x' to each side of the equation. 5 + -7x + 28x = 86 + -28x + 28x Combine like terms: -7x + 28x = 21x 5 + 21x = 86 + -28x + 28x Combine like terms: -28x + 28x = 0 5 + 21x = 86 + 0 5 + 21x = 86 Add '-5' to each side of the equation. 5 + -5 + 21x = 86 + -5 Combine like terms: 5 + -5 = 0 0 + 21x = 86 + -5 21x = 86 + -5 Combine like terms: 86 + -5 = 81 21x = 81 Divide each side by '21'. x = 3.857142857 Simplifying x = 3.857142857
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