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Simplifying -6x + 7(-7x + 22) = -231 Reorder the terms: -6x + 7(22 + -7x) = -231 -6x + (22 * 7 + -7x * 7) = -231 -6x + (154 + -49x) = -231 Reorder the terms: 154 + -6x + -49x = -231 Combine like terms: -6x + -49x = -55x 154 + -55x = -231 Solving 154 + -55x = -231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-154' to each side of the equation. 154 + -154 + -55x = -231 + -154 Combine like terms: 154 + -154 = 0 0 + -55x = -231 + -154 -55x = -231 + -154 Combine like terms: -231 + -154 = -385 -55x = -385 Divide each side by '-55'. x = 7 Simplifying x = 7
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