exam Maths Puzzle Numerical Ability

please help. complete the table of values for each equation
y=3x-7

x column y column
-2
-1
0
1
2
Thanks in advance for the help.

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exam Other Question

The two digits in Jack�s age are the same as the digits in Bill�s age, but in reverse order. In five years Jack will be twice as old as Bill will be then. What is the difference translate each into an equation:
if 9 is subtracted from the varible R,the difference is equal to the varible X divided by 5