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Solve for x: (1/2)x + 3 = 7

Solve for c: 6c − 5 = 13

Solve for p: 3p + 10 = 25

Solve for m: 8m + 4 = 36

Solve for x: 2x + 5 = 15

Is a = 7 a solution for 5a − 10 = 25?

Solve for b: (7/8)b + 3 = 10

A worker works 45 hours at $18/hour, with overtime paid at 1.5x. What is the total pay?

A supplier sells water bottles for $5 each. The store wants a 40% markup. What is the selling price?

Calculate unit cost of 100 pens for $120.