Mathematics

Laci Hancock

19 January, 20:32

Shari and Ana are playing games at an arcade, Shari has

$37.50 and is playing $0.50 games. Ana has $12.75 and

is playing $0.75 games, Sandor wants to know when

Shari and Ana will have the same amount of money

remaining, So he wrote and solved this equation,

Let x number of games played,

Equation: 37.50 - 5x42.75 - 75x

Step 1

37.50 - 1.25x 34

Step 2: - 1,25x5,25

Step 3 - 4.2 x

Sandor knows his answer is incorrect because a

negative number of games cannot be played. What was

Sandor's mistake?

The variable x should represent the amount of

money left

The equation should have sums on both sides.

In step 1, he should have added. 75x to both sides,

In step 3, he should have added 1.25x to both sides.