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Simplifying 7x + 42 + -3x = 156 Reorder the terms: 42 + 7x + -3x = 156 Combine like terms: 7x + -3x = 4x 42 + 4x = 156 Solving 42 + 4x = 156 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 4x = 156 + -42 Combine like terms: 42 + -42 = 0 0 + 4x = 156 + -42 4x = 156 + -42 Combine like terms: 156 + -42 = 114 4x = 114 Divide each side by '4'. x = 28.5 Simplifying x = 28.5
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