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📝 Realistic Substitution Problems 🏷️

Substitute the given values into the equation to solve practical problems.

Questions:

Q20731
A cafe calculates the total bill (B) as B = 2c + 3d + 5, where c is the number of coffees and d is the number of donuts. If a customer orders 4 coffees and 3 donuts, what is the total bill?
Q20732
A taxi fare (F) is calculated as F = 3d + 2t, where d is the number of miles and t is the time in hours. If a passenger travels 12 miles and it takes 2 hours, what is the fare?
Q20733
A gardener calculates the cost of planting (C) as C = 5n + 12l, where n is the number of plants and l is the number of labour hours. If there are 10 plants and 4 labour hours, how much will the gardener charge?
Q20734
A carpenter charges (C) using C = 50 + 20h + 15m, where h is hours of work and m is the material cost. If he works 3 hours and materials cost £40, what is the total charge?
Q20735
A fruit seller calculates daily earnings (E) as E = 2a + 3b, where a is apples sold and b is bananas sold. If she sells 20 apples and 15 bananas, what are her earnings?
Q20736
A photographer charges (P) using P = 40 + 25h + 5f, where h is hours worked and f is number of photos printed. If he works 4 hours and prints 10 photos, what will he charge?
Q20737
A toy maker calculates the cost (C) as C = 10 + 6t + 4m, where t is hours worked and m is the material cost. If he works 5 hours and materials cost £8, what is the total cost?
Q20738
A plumber charges (P) using P = 25 + 15h + 10m, where h is hours of work and m is material cost. If he works 3 hours and spends £20 on materials, what is the total charge?
Q20739
A dog walker calculates payment (D) as D = 5 + 7h + 3p, where h is hours and p is number of dogs. If she walks 4 hours with 5 dogs, how much will she earn?
Q207310
A painter calculates total cost (C) as C = 30 + 10h + 8m, where h is hours and m is the cost of paint. If he works 6 hours and uses paint worth £20, what will he charge?