Verified Answer :

JasmineRenee

The equation you need is 7x/12 = 4.2

the first thing you do is multiply 4.2 x 12 (which equals 50.4) to get 7x by itself.
Then you are left with 7x = 50.4 
then you need to divide 50.4 by 7 (so 50.4/7) 
what does that equal?
it equal 7.2 
so x = 7.2

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