Question

DAU COROANA!PLS!!!!​

Answer 1

Răspuns:

a) [(x+540:6)•7-100]=30•20

[(x+540:6)•7-100]=600

[(x+540:6)•7]=600+100

[(x+540:6)•7]=700

(x+540:6)=700:7

(x+540:6)=100

(x+540)=100•6

x=600-540

x=60

b)(x•9-78•2)+4•25=1492

(x•9-156)+100=1492

(x•9-156)=1492:100

(x•9)=14,92

x=14,92:9

x=..... nu îmi iese nu știu dc vezi tu la ce am greșit

c)[(72:a-3•4)•36-19•5]-(124•6-301•2)=195

[(72:a-3•4)•36-95]-(744-602)=195

[(72:a-3•4)•36-95]-142=195

[(72:a-3•4)•36-95]=195+142

(72:a-3•4•36-95)=337

(72:a-12•36-95)=337

(72:a-432-95)=337

(72:a-337)=337

72:a=337+337

72:a=674

a=674•72

a=48.528