Răspuns :
a) 10/100*x=320
x=320*100/10
x=3200
b) 25/100*10=400
250/100=400 (F)
c)75/100=3/4
3/4*250=100
750/4=100 (F)
d) 12/100*30=360
72/20=360
(F)
x=320*100/10
x=3200
b) 25/100*10=400
250/100=400 (F)
c)75/100=3/4
3/4*250=100
750/4=100 (F)
d) 12/100*30=360
72/20=360
(F)
a. 10/100 ·x=320
⇒x=320/10/100
⇒x=320·100/10
⇒x=320·10⇒x=3200;
b. 25/100 ·x=400
⇒x=400/25/100
⇒x=400·100/25
⇒x=400·4⇒x=1600;
c. 75/100 ·x=100
⇒x=100/75/100
⇒x=100·100/75
⇒x=100·20/15
⇒x=100·4/3
⇒x=400/3⇒x=133.[3];
d. 12/100 ·x=360
⇒x=360/12/100
⇒x=360·100/12
⇒x=360·50/6
⇒x=360·25/3
⇒x=120·25⇒x=3000;
⇒x=320/10/100
⇒x=320·100/10
⇒x=320·10⇒x=3200;
b. 25/100 ·x=400
⇒x=400/25/100
⇒x=400·100/25
⇒x=400·4⇒x=1600;
c. 75/100 ·x=100
⇒x=100/75/100
⇒x=100·100/75
⇒x=100·20/15
⇒x=100·4/3
⇒x=400/3⇒x=133.[3];
d. 12/100 ·x=360
⇒x=360/12/100
⇒x=360·100/12
⇒x=360·50/6
⇒x=360·25/3
⇒x=120·25⇒x=3000;