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Simplifying -7(1 + 3x) + 2x = -121 (1 * -7 + 3x * -7) + 2x = -121 (-7 + -21x) + 2x = -121 Combine like terms: -21x + 2x = -19x -7 + -19x = -121 Solving -7 + -19x = -121 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -19x = -121 + 7 Combine like terms: -7 + 7 = 0 0 + -19x = -121 + 7 -19x = -121 + 7 Combine like terms: -121 + 7 = -114 -19x = -114 Divide each side by '-19'. x = 6 Simplifying x = 6
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