Question

afla numerele necunoscute din expresiile de mai jos.
a. (x+20):12+68=78
b. (x+282-75):2=104
c. x+4:10+101=133
d. 101x[101-(101-102:x)]=202
f. 104:[(x-3x8)x2:8]=13

va rog ajutatima!!este urgent!!!imi trebuie pentru maine!!!

Answer 1

a) (x+20):12+68=78
( x +20):12 =78|-68
(x+20):12= 10|×12
x +20=120|-20
x=100
b)(x+282-75):2=104
(x+282-75):2=104|×2
x+282-75=208+75
x+282= 283|-282
x=1
c) x+4:10+101=133
x+4:10+101=133|-101
x+4:10= 131|×10
x+4=1310| -4
x=1306
d) 101x[101-(101-102:x)]=202
101x[101-(101-102:x)]=202|:101
101-(101-102:x)=2|+101
101-102:x=103|+101
102:x=204|×102
x= 20808
f) 104:[(x-3x8)x2:8]=13
104:[(x-3x8)x2:8]=13|×104
(x-3x8)x2:8=1,352|×8
(x-3x8)x2= 10,816|:2
x-3x8=5408|:8
x-3=676|+3
x=679