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Simplifying 28 + -7x = 40 + -3x Solving 28 + -7x = 40 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 28 + -7x + 3x = 40 + -3x + 3x Combine like terms: -7x + 3x = -4x 28 + -4x = 40 + -3x + 3x Combine like terms: -3x + 3x = 0 28 + -4x = 40 + 0 28 + -4x = 40 Add '-28' to each side of the equation. 28 + -28 + -4x = 40 + -28 Combine like terms: 28 + -28 = 0 0 + -4x = 40 + -28 -4x = 40 + -28 Combine like terms: 40 + -28 = 12 -4x = 12 Divide each side by '-4'. x = -3 Simplifying x = -3
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