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Simplifying -56 = 20 + -1(-1I) Remove parenthesis around (-1I) -56 = 20 + -1 * -1I Multiply -1 * -1 -56 = 20 + 1I Solving -56 = 20 + 1I Solving for variable 'I'. Move all terms containing I to the left, all other terms to the right. Add '-1I' to each side of the equation. -56 + -1I = 20 + 1I + -1I Combine like terms: 1I + -1I = 0 -56 + -1I = 20 + 0 -56 + -1I = 20 Add '56' to each side of the equation. -56 + 56 + -1I = 20 + 56 Combine like terms: -56 + 56 = 0 0 + -1I = 20 + 56 -1I = 20 + 56 Combine like terms: 20 + 56 = 76 -1I = 76 Divide each side by '-1'. I = -76 Simplifying I = -76
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