remove the grouping symbols then simplify the following:

Question

1. -{10x-[16y-(7-8x)-4]}
2. 7y-[16x-(17y-5x)]
3. -[6x-(5y-18x)]
4. 5x-{-6-[(5x-y-6]-8x-y}-5y
5. -6(x-5y)-(5x=7y)-(8x-10y)

Answer 1

-{10x-[16y-(7-8x)-4]}

-{10x-[16y-7+8x-4]}

-{10x-[16y+8x-11]}

-{10x-16y-8x+11}

-{2x-16y+11}

-2x+16y-11

 

7y-[16x-(17y-5x)]

7y-[16x-17y+5x]

7y-[21x-17y]

7y-21x+17y

24y-21x

 

-[6x-(5y-18x)]

-[6x-5y+18x]

-[24x-5y]

-24x+5y

 

5x-{-6-[5x-y-6]-8x-y}-5y

5x-{-6-5x+y+6-8x-y}-5y

5x-{-13x}-5y

5x+13x-5y

18x-5y

 

-6(x-5y)-(5x-7y)-(8x-10y) or maybe it should be ...(5x+7y)...

-6x+30y-5x+7y-8x+10y

-19x+47y, or

-6x+30y-5x-7y-8x+10y

-19x+33y