Connecting Rules

Here are some equations that are true when x=3 and y=4 but there is at least one mistake. Click on the ticks and crosses to show this piece of work correctly marked.

x + y = 7

x - y = 1

y - x = 4

2x + 3y = 18

5x - 2y = 7

4y - x = 19

xy - 10 = 2

180 - 2x + y = 178

20x - 3xy = 24

x2 + y = 13

10x - y2 = 14

y2 - x2 = 7

x2y + 13 = 49

x2y2 - 2x = 138

x2y3 = 591

x! + y = 10

5(x + y) = 35

3y รท x = 22

xy
2
= 6
84
xy
= 7
15y
5x
= y

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