Answer:
1. x=5
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
