exam Maths Puzzle Numerical Ability

Solve the following system of equations using the elimination method:

x/5 + y = 6/5
x/10 + y/3 = 5/6

The y value of the solution is:

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exam Other Question

I would apprecaite some help with :

Simplify

5^5 times the square root of -32
Solve for x: logbase9 x=-1/2