book Maths Puzzle Numerical Ability

MY QUESTION IS FOR A FRIEND OF MINES DAUGHTER. I AM NOT SURE I HAVE ALL OF THE INFO FOR THE PROBLEM, BUT THIS IS WHAT I HAVE : G+(20+12)=

THAT'S IT SO IF YOU COULD HELP US THAT

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book Other Question

SHOW THAT EACH NUMBER CAN BE WRITTEN AS THE RATIO OF TWO INTEGERS.

-3.1
7x-5-5x=15