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Simplifying 145 = -7x + -3(7x + 17) Reorder the terms: 145 = -7x + -3(17 + 7x) 145 = -7x + (17 * -3 + 7x * -3) 145 = -7x + (-51 + -21x) Reorder the terms: 145 = -51 + -7x + -21x Combine like terms: -7x + -21x = -28x 145 = -51 + -28x Solving 145 = -51 + -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. 145 + 28x = -51 + -28x + 28x Combine like terms: -28x + 28x = 0 145 + 28x = -51 + 0 145 + 28x = -51 Add '-145' to each side of the equation. 145 + -145 + 28x = -51 + -145 Combine like terms: 145 + -145 = 0 0 + 28x = -51 + -145 28x = -51 + -145 Combine like terms: -51 + -145 = -196 28x = -196 Divide each side by '28'. x = -7 Simplifying x = -7
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