Answer
$6.9y-0.5$
Work Step by Step
$7.9y-0.7-y+0.2$
Combine like terms
$$7.9y-y=6.9y$$
$$-0.7+0.2=-0.5$$
$6.9y-0.5$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.