78x + (-34y) - (-23x) - y

=101x−35y

Step-by-step explanation:

=78x+−34y+23x+−y

Combine Like Terms:

=78x+−34y+23x+−y

=(78x+23x)+(−34y+−y)

=101x+−35y

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

hope this you and

step-by-step explanation: