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Simplifying 15 + -4 = 42 + -7x Combine like terms: 15 + -4 = 11 11 = 42 + -7x Solving 11 = 42 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 11 + 7x = 42 + -7x + 7x Combine like terms: -7x + 7x = 0 11 + 7x = 42 + 0 11 + 7x = 42 Add '-11' to each side of the equation. 11 + -11 + 7x = 42 + -11 Combine like terms: 11 + -11 = 0 0 + 7x = 42 + -11 7x = 42 + -11 Combine like terms: 42 + -11 = 31 7x = 31 Divide each side by '7'. x = 4.428571429 Simplifying x = 4.428571429
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