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Simplifying 7 + -9x = 121 + -30x Solving 7 + -9x = 121 + -30x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '30x' to each side of the equation. 7 + -9x + 30x = 121 + -30x + 30x Combine like terms: -9x + 30x = 21x 7 + 21x = 121 + -30x + 30x Combine like terms: -30x + 30x = 0 7 + 21x = 121 + 0 7 + 21x = 121 Add '-7' to each side of the equation. 7 + -7 + 21x = 121 + -7 Combine like terms: 7 + -7 = 0 0 + 21x = 121 + -7 21x = 121 + -7 Combine like terms: 121 + -7 = 114 21x = 114 Divide each side by '21'. x = 5.428571429 Simplifying x = 5.428571429
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