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Simplifying 187 = 3x + 7(4x + -3 + -3) Reorder the terms: 187 = 3x + 7(-3 + -3 + 4x) Combine like terms: -3 + -3 = -6 187 = 3x + 7(-6 + 4x) 187 = 3x + (-6 * 7 + 4x * 7) 187 = 3x + (-42 + 28x) Reorder the terms: 187 = -42 + 3x + 28x Combine like terms: 3x + 28x = 31x 187 = -42 + 31x Solving 187 = -42 + 31x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-31x' to each side of the equation. 187 + -31x = -42 + 31x + -31x Combine like terms: 31x + -31x = 0 187 + -31x = -42 + 0 187 + -31x = -42 Add '-187' to each side of the equation. 187 + -187 + -31x = -42 + -187 Combine like terms: 187 + -187 = 0 0 + -31x = -42 + -187 -31x = -42 + -187 Combine like terms: -42 + -187 = -229 -31x = -229 Divide each side by '-31'. x = 7.387096774 Simplifying x = 7.387096774
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