exam Maths Puzzle Numerical Ability

Subtract, using the vertical method.

7x� +6x from 9x� -3

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exam Other Question

The question is: On a number line,the square root of 60 is between which two consequtive numbers?

I got in between 7&8 because 7*7=49 and 8*8=64 and they are in between60.Is that right?
Thank You I am extremely confused with how to solve fractions...especially fractions with two variables.

1/2 x + 1/3 y = 1/3
1/6 x + 1/3 y = 2/9