Question

Punctul d) la 12 și tot ex 13.Va rog!Dau coroana!E urgent!​

Answer 1

Răspuns:

Explicație pas cu pas:

d)

[ (b-8.000) :50+900] :250=4

(b-8.000):50+900=4*250

(b-8.000):50+900=1.000

(b-8.000):50=1.000-900

(b-8.000):50=100

(b-8.000)=100*50

b-8.000=5.000

b=5.000+8.000

b= 13.000

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13)

a)

[(x-1):100+90 ] :10 -10=0

[(x-1):100+90 ] :10= 10

[(x-1):100+90]=10*10

(x-1):100+90=100

(x-1):100 =100-90

(x-1):100=10

x-1=10*100

x-1=1.000

x= 1.000+1

x= 1.001

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b)

[( x-416:4+2) -5+3] *10 =2.000

[ (x-416:4+2) -5+3]=2.000:10

[ (x-416:4+2)-5+3=200

(x-104+2)-5=200-3

(x-106)-5=197

x-106=197+5

x-106=202

x= 202+106

x= 308

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c)

160:8+800:5=x:3-480:4

20+160=x:3-120

x:3=20+160+120

x:3 =300

x= 300*3

x=900

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d)

[ (x+428:4)*2+5] *2-186= 800

[(x+107)*2+5] *2=800+186

[(x+107)*2+5] *2=986

(x+107)*2+5=986:2

(x+107)*2+5=493

(x+107)*2=493-5

(x+107)*2=488

x+107=488:2

x+107=244

x= 244-107

x=137