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Simplifying 7x + -4 + 87 = 90 Reorder the terms: -4 + 87 + 7x = 90 Combine like terms: -4 + 87 = 83 83 + 7x = 90 Solving 83 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-83' to each side of the equation. 83 + -83 + 7x = 90 + -83 Combine like terms: 83 + -83 = 0 0 + 7x = 90 + -83 7x = 90 + -83 Combine like terms: 90 + -83 = 7 7x = 7 Divide each side by '7'. x = 1 Simplifying x = 1
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