16Hit1600
AlgebraEasy–MediumFirst variable from a relation between two

Algebra practice question

The quantities u and v satisfy 2u + 5v = 26. When v = 4, what is the value of u?

Answer: 3

2u + 20 = 26 gives 2u = 6, so u = 3.

Common wrong answers

If you answered 6
6 is 2u.
If you answered 13
13 divides 26 by 2, ignoring v.
If you answered 23
23 adds 20 to 26 before halving, roughly; 46/2 = 23.

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