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3x<-3/:3
x>-1
18-7x≥-4
-7x≥-4-18
-7x≥-22/:(-7)
x≤22/7
x≤3i1/7
1/2x + 1/2x - x = - 10
0 = -10
3x-5<-8
3x < -8 + 5
3x < -3 / 3
x < -1
18-7x≥-4
-7x > -4 - 18
-7x > - 22 / -7
x < 3,14