6th grade math plz help

1 and 3

Step-by-step explanation:

-9+y=18

step 1 add 9 to each side

18+9=27

we're left with

y=27

2. -18+y=-45

step 1 add 18 to each side

-45+18=-27

were left with

y=-27 , this equal --27 not 27 therefore it is not correct

3. 5y=135

step 1 divide each side by 5

135/5=27

we're left with

y=27

4. 2y = 29

step 1 divide each side by 2

were left with 29/2

so we can conclude that equations 1 and 2 have a value of y=27

step-by-step explanation: 4 cause 2+2=4