Question
Write the following statements by using appropriate grouping symbols:
Three times the sum of 2x + y - [5 - (x - 3y)] and 7x - 4y + 3 is subtracted from 3x - 4y + 7

Answer

Three times the sum of 2x + y - {5 - (x - 3y)} and 7x - 4y + 3
= 3[(2x + y - {5 - (x - 3y)}) + (7x - 4y + 3)]
This is subtracted from 3x - 4y + 7
Thus, the required expression is (3x - 4y + 7) - 3[(2x + y - {5 - (x - 3y)}) + (7x - 4y + 3)]

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