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Simplifying 7 = -8x + 21 Reorder the terms: 7 = 21 + -8x Solving 7 = 21 + -8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8x' to each side of the equation. 7 + 8x = 21 + -8x + 8x Combine like terms: -8x + 8x = 0 7 + 8x = 21 + 0 7 + 8x = 21 Add '-7' to each side of the equation. 7 + -7 + 8x = 21 + -7 Combine like terms: 7 + -7 = 0 0 + 8x = 21 + -7 8x = 21 + -7 Combine like terms: 21 + -7 = 14 8x = 14 Divide each side by '8'. x = 1.75 Simplifying x = 1.75
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