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Simplifying -98 = 7x + -7(4x + -13) Reorder the terms: -98 = 7x + -7(-13 + 4x) -98 = 7x + (-13 * -7 + 4x * -7) -98 = 7x + (91 + -28x) Reorder the terms: -98 = 91 + 7x + -28x Combine like terms: 7x + -28x = -21x -98 = 91 + -21x Solving -98 = 91 + -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. -98 + 21x = 91 + -21x + 21x Combine like terms: -21x + 21x = 0 -98 + 21x = 91 + 0 -98 + 21x = 91 Add '98' to each side of the equation. -98 + 98 + 21x = 91 + 98 Combine like terms: -98 + 98 = 0 0 + 21x = 91 + 98 21x = 91 + 98 Combine like terms: 91 + 98 = 189 21x = 189 Divide each side by '21'. x = 9 Simplifying x = 9
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