Question

Va rog ajutați-mă dau coroană!!! ​

Answer 1

8. (4x+3y)/(7x+9y)=3/8

8(4x+3y)=3(7x+9y)

32x+24y=21x+27y

32x-21x=27y-24y

11x=3y

x/y=3/11

9. a) 5/12+30/25×15/12=

=5/12+6/5×5/4=

=5/12+3/2=

=5/12+18/12=23/12

b) 0,3:1/12=

=3/10:1/12=

=3/10×12=18/5

c) (0,25+3×1/12):2 1/2=

=(1/4+1/4):5/2=

=2/4:5/2=

=1/2:5/2=

=1/2×2/5=1/5

d) 6/13+0,2=

=6/13+1/5=

=30/65+13/65=43/65