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Mathematics
Maximillian Hatfield
22 August, 03:01
Solving compound inequalities
14r+20 15-9r
+5
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Porter Wright
22 August, 03:43
0
14r+2015-9r
14r+20<14r+16
14r+20-14r<14r+16-14r (Subtract 14r from both sides)
20<16
20-20<16-20 (Subtract 20 from both sides)
0<-4
8-10r>15-9r
-10r+8>-9r+15 (Simplify both sides of the inequality)
-10r+8+9r>-9r+15+9r (Add 9r to both sides)
-r+8>15
-r+8-8>15-8 (Subtract 8 from both sides)
-r>7
-r/-1 > 7/-1 (Divide both sides by - 1)
r<-7
Ur answer is:
r < - 7 OR 0 < - 4
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