Question

va rog sa ma ajutati ...fara cele cu procente!

Answer 1

ex 1a) 3/4; 3/5; 3/3
           4/3;4/5;4/4
           5/3;5/4;5/5
c) 7/13+5/13= /7+5/13= 12/13
        d) 21/6-9/6= /21-9/6= 12/6=2
ex2 a) 2/3= 10/15, 1/8=5/40, 10/9= 50/45
b) n+1/12=5/3
    3(n+1)=60
     n+1=20
     n=20-1
     n=19
c) 61/35-2x/35=19/35+22/35
     61/35-2x/35=/19+22/35
    61/35-2x/35=41/35
    35×61/35-35×2x/35=35×41/35
61-2x=41
-2x=41-61
-2x=-20
x=10