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Simplifying -140 = -4(-7x + -7) Reorder the terms: -140 = -4(-7 + -7x) -140 = (-7 * -4 + -7x * -4) -140 = (28 + 28x) Solving -140 = 28 + 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. -140 + -28x = 28 + 28x + -28x Combine like terms: 28x + -28x = 0 -140 + -28x = 28 + 0 -140 + -28x = 28 Add '140' to each side of the equation. -140 + 140 + -28x = 28 + 140 Combine like terms: -140 + 140 = 0 0 + -28x = 28 + 140 -28x = 28 + 140 Combine like terms: 28 + 140 = 168 -28x = 168 Divide each side by '-28'. x = -6 Simplifying x = -6
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