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2.54 : 1

Step-by-step explanation:

(For the first part)

So 1 inch = 2.54 centimeters

30 x 2.54 = 76.2

(For the second part)

2.54 : 1

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: