Question

  

Answer 1

8: =>10-x-2=5

=>7-x=5

=>x=2

9: =>x-4+5=13

=>x+1=13

=>x=12

10: =>x+5=5

=>x=0

Answer 2

\(8,\left(10-x\right)+\left(3-5\right)=7-2\\ =>10-x-2=5\\ =>10-x=7\\ =>x=10-7\\ =>x=3\\ 9,x-4+\left(10-5\right)=10+3\\ =>x-4+5=13\\ =>x-4=8\\ =>x=12\)

\(10,7-\left(5+x\right)=2\\ =>5+x=7-2\\ =>5+x=5\\ =>x=0\\11,15-\left(3+x\right)=4\\ =>3+x=15-4\\ =>3+x=11\\ =>x=11-3\\ =>x=8 \)

Answer 3

8.x=3

9.x=12

10.x=0

11.x=8