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Simplifying 7x + -3x + 7 = 3(12) + 20 Reorder the terms: 7 + 7x + -3x = 3(12) + 20 Combine like terms: 7x + -3x = 4x 7 + 4x = 3(12) + 20 Multiply 3 * 12 7 + 4x = 36 + 20 Combine like terms: 36 + 20 = 56 7 + 4x = 56 Solving 7 + 4x = 56 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 + 4x = 56 + -7 Combine like terms: 7 + -7 = 0 0 + 4x = 56 + -7 4x = 56 + -7 Combine like terms: 56 + -7 = 49 4x = 49 Divide each side by '4'. x = 12.25 Simplifying x = 12.25
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