Answer:

2. y=4

3. x=20

4. 60°

5. 55

Step-by-step explanation:

2.

4y+8=24

4y=24-8

4y=16

y=4

1.

7x-4=31

7x=31+4

7x=35

x=5

3.2x+11=3x-9

2x-3x=-9-11

-x=-20

x=20

4.y+10=2y-40

y-2y=-40-10

-y=-50

y=50

substitute

2y-40=2(50)-40

=100-40

=60

5. based on no. 3

2x+11=2(20)+11

=40+11

=55

Step-by-step explanation:

not my answer.