exam Maths Puzzle Numerical Ability

hi, im trying to solve for x.

1/4x-2=1/2x-3

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exam Other Question

Solve for the indicated letter.

Solve the formula
S =1/3 pi2^2h + 4 pirh for r. a wallet contains the same number of pennies,nickels and dimes the coins total is $1.44. How many of each type of coins does the wallet contains if the pennies is equals to 1 centavo,nickels is 5 centavo and the dimes is 10 centavo?