exam Maths Puzzle Numerical Ability

When John F. Kennedy was Sworn in as President, he was 1 year older than Teddy Roosevelt was when Roosevelt took the office. If the sum of their when each became President was 85, how wold was Kennedy when he was sworn in?

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exam Other Question

Write the equation of the line L satisfying the given geometric conditions.

L has y-intercept (0,-3)and is parallel to the line with equation
y=2/3x+1

please show work and equation please help if you can,

Solve this system of equations

4a+7b=27

8a-3c=-22

6b-3c=24

The solution is [],[],[] Thank you