Solve the system: y = x + 1 and y = 2x - 3.

Set x + 1 = 2x - 3, giving x = 4 and y = 5.

What is the value of x in 5/x = 10/8?

Cross-multiply: 10x = 40, so x = 4.

Twice a number is 2n, and seven less means subtract 7.

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A taxi charges $3 plus $2 per mile. Which equation gives the cost C for m miles?