Question

3a + 2 = 20

Answer 1

1) a=6
3a+2=20
3a=20-2
3a=18
a=18/3
a=6

2) b=1
5(b+1)=10
b+1=10/5
b+1=2
b=2-1
b=1

3) y=2
3(2y-3)-2y=y-3
6y-9-2y=y-3
4y-9=y-3
4y=y-3+9
4y=y+6
4y-y=6
3y=6
y=6/3
y=2

4) p=2
2+(2+4p)=6p
2+2+4p=6p
4p+4=6p
4=6p-4p
4=2p
4/2=p
2=p
p=2

Answer 2

1. 3a=20-2
3a=18
a=6

2. b+1=2
b=2-1
b=1

3. 6y-9-2y=y-3
4y-9=y-3
4y-y=-3+9
3y=6
y=2

4. 2+2+4p=6p
4+4p=6p
4p-6p=-4
-2p=-4
p=2