A.
1. x + 5 = 15
2. 3 < 2x
3. 8 + x = 20
4. x/2 = 12
B.
1. 4x + 4 = 16
4x = 16 - 4
4x = 12
x = 12/4
x = 3
2. 2(x + 4) = 20
x + 4 = 20/2
x + 4 = 10
x = 10 - 4
x = 6
3. 5x - 1 = 24
5x = 24 + 1
5x = 25
x = 25/5
x = 5
4. x + 5 > 16
x > 16 - 5
x > 11
5. 3x - 2 <= 7
3x <= 9
x <= 3
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Answers & Comments
A.
1. x + 5 = 15
2. 3 < 2x
3. 8 + x = 20
4. x/2 = 12
B.
1. 4x + 4 = 16
4x = 16 - 4
4x = 12
x = 12/4
x = 3
2. 2(x + 4) = 20
x + 4 = 20/2
x + 4 = 10
x = 10 - 4
x = 6
3. 5x - 1 = 24
5x = 24 + 1
5x = 25
x = 25/5
x = 5
4. x + 5 > 16
x > 16 - 5
x > 11
5. 3x - 2 <= 7
3x <= 9
x <= 3