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Simplifying 3x + -7(7x + 9) = 3 + -1x Reorder the terms: 3x + -7(9 + 7x) = 3 + -1x 3x + (9 * -7 + 7x * -7) = 3 + -1x 3x + (-63 + -49x) = 3 + -1x Reorder the terms: -63 + 3x + -49x = 3 + -1x Combine like terms: 3x + -49x = -46x -63 + -46x = 3 + -1x Solving -63 + -46x = 3 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. -63 + -46x + x = 3 + -1x + x Combine like terms: -46x + x = -45x -63 + -45x = 3 + -1x + x Combine like terms: -1x + x = 0 -63 + -45x = 3 + 0 -63 + -45x = 3 Add '63' to each side of the equation. -63 + 63 + -45x = 3 + 63 Combine like terms: -63 + 63 = 0 0 + -45x = 3 + 63 -45x = 3 + 63 Combine like terms: 3 + 63 = 66 -45x = 66 Divide each side by '-45'. x = -1.466666667 Simplifying x = -1.466666667
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