The sum of twice a number and 4 is at least 16 inequality=
2 answers:
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For the problem in the upper left corner, see "figure 1"
For the problem in the upper right corner, see "figure 2"
For the problem in the lower left corner, see "figure 3"
For the problem in the lower right corner, see "figure 4"
For the problem in the upper right corner, see "figure 2"
For the problem in the lower left corner, see "figure 3"
For the problem in the lower right corner, see "figure 4"