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Simplifying 7 = x + -1(-4) Multiply -1 * -4 7 = x + 4 Reorder the terms: 7 = 4 + x Solving 7 = 4 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 7 + -1x = 4 + x + -1x Combine like terms: x + -1x = 0 7 + -1x = 4 + 0 7 + -1x = 4 Add '-7' to each side of the equation. 7 + -7 + -1x = 4 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 4 + -7 -1x = 4 + -7 Combine like terms: 4 + -7 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3
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