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Simplifying -63 = -7(4 + x) -63 = (4 * -7 + x * -7) -63 = (-28 + -7x) Solving -63 = -28 + -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. -63 + 7x = -28 + -7x + 7x Combine like terms: -7x + 7x = 0 -63 + 7x = -28 + 0 -63 + 7x = -28 Add '63' to each side of the equation. -63 + 63 + 7x = -28 + 63 Combine like terms: -63 + 63 = 0 0 + 7x = -28 + 63 7x = -28 + 63 Combine like terms: -28 + 63 = 35 7x = 35 Divide each side by '7'. x = 5 Simplifying x = 5
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