exam Maths Puzzle Numerical Ability

solving literal equations
3a+2-x=7a-3x

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exam Other Question

Sales--Tickets for a concert were sold to adults for $3 and to students for $2.
If the total sold were the amount of $ 824 and twice as many adult tickets were
sold,then how many of each were sold? Please help me with this

What is the equation for the inverse of the function f (x) = 4x - 3?