Which step did the student make and error in solving the equation?(step numbers in circled in blue font) A.2
B.3
C.5
D. No mistake

it is A, because they wrote that they added 2x to 5x but didn't actually do that. it should be 7x.

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

number one is the correct answer

step-by-step explanation: dogs and cats are mentioned, no other animals