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Simplifying -7(1 + -7x) = -7 + 3x (1 * -7 + -7x * -7) = -7 + 3x (-7 + 49x) = -7 + 3x Add '7' to each side of the equation. -7 + 7 + 49x = -7 + 7 + 3x Combine like terms: -7 + 7 = 0 0 + 49x = -7 + 7 + 3x 49x = -7 + 7 + 3x Combine like terms: -7 + 7 = 0 49x = 0 + 3x 49x = 3x Solving 49x = 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. 49x + -3x = 3x + -3x Combine like terms: 49x + -3x = 46x 46x = 3x + -3x Combine like terms: 3x + -3x = 0 46x = 0 Divide each side by '46'. x = 0 Simplifying x = 0
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