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 $(3x - 4y + 7) - 3[(2x + y - {5 - (x - 3y)}) + (7x - 4y + 3)]$
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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