Statement Reason m∠AOB=180 degrees def of straight

m∠AOF+m∠FOG+m∠GOB=m∠AOB Parts-whole postulate

5x+15 degrees+90 degrees+2x=180 degrees substitution given

x=?

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 first option is the answer.

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step-by-step explanation: