exam Maths Puzzle Numerical Ability

The difference of two numbers is 45. The second is 3 less than 3 times the first. What are the two numbers?

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exam Other Question

h(x)e^-x Description of transformation, Equations for the Horizontal Asymptote, y-intercept in (x,y) form. I am not sure how to do this one becuase of the -x? Help solve the equation: -10=-6+x