Answer:
[see below]
Step-by-step explanation:
For the first problem:
[tex][2+5(34+56)]+43-23*4\\\\\\\rightarrow[2+5(34+56)]\\\\(34+56)=90\\\\\rightarrow[2+5(90)]\\\\2 + 450\\\\452\\\\\\452+43-23*4\\\\452+43-92\\\\\boxed{403}[/tex]
For the second one:
[tex]5x=25\\\\5x/5=25/5\\\\\boxed{x=5}[/tex]
Hope this helps.