Please help before my teacher gets mad at me

a) 412 have a brother or sister in the school

b) 242 are girls

c) 339 are 13 years old or under

Step-by-step explanation:

Part a:

515 x 80%

412

Part b:

515 x 47%

242

Part c:

515 x 66%

339

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

the correct answer is x/3+10≥32

hope this !