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3) 4y ≥ -16
2x ≤ 4
x-2y ≥ 6

4) 2x+3y ≥ -7
x-3y ≤ 28
x+6y ≤ -26

3. The solution is the region below the line y = x/2 - 1, above y = -4 and towards left of x = 2. (All bold)

4. The solution is the region above the lines y = -2x/3 -7/3 and y = x/3 - 28/3 and below the line y = -x/6 - 13/3. (All bold)

Step-by-step explanation:

3) 4y ≥ -16

y ≥ -4

2x ≤ 4

x ≤ 2

x-2y ≥ 6

2y ≤ x - 2

y ≤ x/2 - 1

The solution is the region below the line y = x/2 - 1, above y = -4 and towards left of x = 2. (All bold)

4) 2x+3y ≥ -7

3y ≥ -2x -7

y ≥ -2x/3 -7/3

x-3y ≤ 28

3y ≥ x - 28

y ≥ x/3 - 28/3

x+6y ≤ -26

6y ≤ -x - 26

y ≤ -x/6 - 13/3

The solution is the region above the lines y = -2x/3 -7/3 and y = x/3 - 28/3 and below the line y = -x/6 - 13/3. (All bold)

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step-by-step explanation: