exam Maths Puzzle Numerical Ability

solve the nonlinear system

y-x^2 =-1
2y-3x =0

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exam Other Question

Can someone help me with problem?

I need this set of numbers evaluate:
|-9|-|-4|

Thanks,
Sher Solve:
a) 2logbase6 x - logbase6 4=logbase6(x-1)
b) 3(^2x+1) -28(3)^x)+9=0
c) 4(^1-x)=3*5^x