Question

16 va rog frumos sa mă ajutați

Answer 1

15.
445+5xb=990
5xb=990-445
5xb=545
b=545:5
b=19

752:8+483-909:3-d=100
94+483-303-100=d
d=174

c:8+69x9-674=734
c:8+621-674=734
c:8=734-621+674
c:8=113+674
c:8=787
c=787x8
c=2296

c-388:4+603:3-506=224
c-97+201-506=224
c=224+97-201+506
c=321-201+506
c=120+506
c=626

16.a+b+c=586
a-35=b-16=5-34
a-35=c-34
a=c-34+35
a=c+1------
b-16=c-34
b=c-34+16
b=c-18-----
inlocuim in prima relatie
c+1+c-18+c=586
3c-17=586
3c=586+17
3c=603
c=603:3
c=201
a-35=201-34
a=201+35-34
a=202
202-35=b-16
167=b-16
b=167+16
b=183