exam Maths Puzzle Numerical Ability

what would these two looked like graphed together?

x+2y=3

and

3x-y=-5

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exam Other Question

add 2/5 plus 3/4 minus 1/2 THE AMOUNT A IN AN ACCOUNT AFTER t YEARS FROM AN INITIAL PRINCIPLE P INVESTED AT AN ANNUAL RATE r COMPOUNDED CONTINUOUSLY IS GIVEN BY A =Pe^rt WHERE r IS EXPRESSED AS A DECIMAL. SOLVE THIS FORMULA FOR t IN TERMS OF A,P,AND r.