Question

1.... Aflati valorile literelor din egalitatile: (a+80):2=50 ; 4*(b*5)=200 ; (c-75):5=125 ; 421-(d+138)=109......
2.....Aflati valoarea lui x din egalitatea: (2 728-x*3):17=125.

Answer 1

(a+80):2=50
a+80=50*2
a+80=100
a=100-80
a=20

4(b*5)=200
b*5=200/4
b*5=50
b=50/5
b=10

(c-75):5=125
c-75=125*5
c-75=625
c=625+75
c=700

421-(d+138)=109
-d-138=109+421
-d-138=530
-d=530+138
-d=668
d=-668