exam Maths Puzzle Numerical Ability

write 3^x=y in log form

I think it should be logx^3=y

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exam Other Question

What is a easier way to solve problems such as: 2x-3+4x=5x-1 400 tickets sold, students $2.00, adults $3.00. Took in $1050.00 How many of each sold?
I think the equation is $2.00x+$3.00=$1050.00
x+y=400