👤

afla valoarea lui X
a) 200-(X-20)=120 ; b) (X:2)x4=100


Răspuns :

a) 200-(X-20)=120
x-20=200-120
x-20=80
x=80+20
x=100


 b) (X:2)x4=100
x:2=100:4
x:2=25
x=25x2
x=50