If 27 + 31 = 85; 31 + 27 = 89, then find the value of − y
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31x + 27y = 89 ......(2). To find, the values of x and y= By substitution method,. From (1),. 27x + 31y = 85. ⇒ 27x = 85 - 31y.
Missing: − | Must include: −
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incorrect question type correct
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