Question

dau coroana la primul si corectul raspuns la prb 22 23
va rogggggggggggg

Answer 1

22.
a)a=11b/8
11b/8 + b = 76
11b+8b=608
19b=608 =>b=32 =>a=44
b)11b/8 - b = 9/10
55b-40b=36
15b=36 l:3 =>5b=12 =>b=2,4 =>a=3,3
c)33b/8 + b = 41
33b+8b=328
41b=328 =>b=8 =>a=11

23.
a)3y=4x-4y =>4x=7y =>x/y=7/4
b)73y=30x+15y =>58y=30x  l:2 =>29y=15x =>x/y=29/15
c)18y=12x-4y =>22y=12x  l:2 =>11y=6x =>x/y=11/6
d)7x-7y=3x+3y =>4x=10y   l:2 =>2x=5y =>x/y=5/2
e)5x+10y=17x =>12x=10y  l:2 =>6x=5y =>x/y=5/6
f)34x+17y=13x+26y =>21x=9y  l:3 =>7x=3y =>x/y=3/7
g)11x+11y=32x-16y =>21x=27y  l:3 =>7x=9y =>x/y=9/7
h)3x+8y=9x =>6x=8y  l:2 =>3x=4y =>x/y=4/3