b={1,6,10,19}
c={3,8,12,21}
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A - x mai mic sau egal cu 1
x={0,1,2,3,4,5,6,7,8,9,10,11}
B - 2y+1≥37, 2y≥37-1, 2y≥36, y≥36:2, y≥18
y={18,infinit}
C-enunt incomplet
D-enunt incomplet dar presupun ca e m+3
m+3>130, m>130-3, m>127
m={128,infinit}