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x - 2 = 13

x - 2 + 2 = 13 + 2

Feedback:

Not right. What you do on the left you must do on the right. You need to look at examples. For the moment, we'll move on to the next step.

Instruction:

Write the next line calculating both sides.

type answer, press enter:

view example	x - 2 = 13
	x - 2 + 2 = 13 + 2
Feedback:	Not right. What you do on the left you must do on the right. You need to look at examples. For the moment, we'll move on to the next step.
Instruction:	Write the next line calculating both sides.
type answer, press enter: