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Simplifying 18x + -1(8x + -7) = 69 Reorder the terms: 18x + -1(-7 + 8x) = 69 18x + (-7 * -1 + 8x * -1) = 69 18x + (7 + -8x) = 69 Reorder the terms: 7 + 18x + -8x = 69 Combine like terms: 18x + -8x = 10x 7 + 10x = 69 Solving 7 + 10x = 69 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 + 10x = 69 + -7 Combine like terms: 7 + -7 = 0 0 + 10x = 69 + -7 10x = 69 + -7 Combine like terms: 69 + -7 = 62 10x = 62 Divide each side by '10'. x = 6.2 Simplifying x = 6.2
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