5 out of 9-1 out of 12 = 7 out of 12 write clearly

5 out of 9-1 out of 12 = 7 out of 12
5x/9-1/12=7/12
5x/9=1/12+7/12
5x/9=8/12
x=8/12 * 9/5
x=6/5=1.2

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