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Simplifying 70 + -4 * 8 + -1(2 * 9 + 7) = N Multiply -4 * 8 70 + -32 + -1(2 * 9 + 7) = N Multiply 2 * 9 70 + -32 + -1(18 + 7) = N Combine like terms: 18 + 7 = 25 70 + -32 + -1(25) = N Multiply -1 * 25 70 + -32 + -25 = N Combine like terms: 70 + -32 = 38 38 + -25 = N Combine like terms: 38 + -25 = 13 13 = N Solving 13 = N Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Add '-1N' to each side of the equation. 13 + -1N = N + -1N Combine like terms: N + -1N = 0 13 + -1N = 0 Add '-13' to each side of the equation. 13 + -13 + -1N = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -1N = 0 + -13 -1N = 0 + -13 Combine like terms: 0 + -13 = -13 -1N = -13 Divide each side by '-1'. N = 13 Simplifying N = 13
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