Question

URGENT. OFER 40 PUNCTE SI STELUTE!!

Rezolvati ecuatiile:

x - 12,5 = 13 1/5. x= ?
x + 14,31 -54 = -3/5. x = ?
4 pe 3 : x = 5 pe 3 - 1,(3). x= ?

Answer 1

Răspuns:

x-12,5=13si1/5

x-12,5=66/5

x-125/10=66/5

x=66/5+125/10

x=132/10+125/10=257/10=25,7

___________

x+14,31-54=-3/5

x+1431/100-5400/100=-60/100

x=-60/100-1431/100+5400/100

x=3909/100=39,09

__________

4/3:x=5/3-4/3

x=4/3:1/3

x=4/3·3/1=4

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1,(3)=(13-1)/9=12/9=4/3