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Simplifying -7 = 4 + -1(-1x) Remove parenthesis around (-1x) -7 = 4 + -1 * -1x Multiply -1 * -1 -7 = 4 + 1x Solving -7 = 4 + 1x 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 + 1x + -1x Combine like terms: 1x + -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 = 11 -1x = 11 Divide each side by '-1'. x = -11 Simplifying x = -11
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