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Donna Lang
Mathematics
20 October, 23:07
12x-39≤9 AND-4x+3<-6
+4
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2
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Maddie
20 October, 23:24
0
2 1/4 < x ≤ 4
Step-by-step explanation:
12x-39≤9 AND-4x+3<-6
Solve them separately and then put back together
12x-39≤9
Add 39 to each side
12x-39+39≤9+39
12x ≤48
Divide by 12
12x/12 ≤48/12
x ≤4
Now the other inequality
-4x+3<-6
Subtract 3 from each side
-4x+3-3<-6-3
-4x < - 9
Divide by - 4, remembering to flip the inequality
-4x/-4 > - 9/-4
x > 2 1/4
put back together
x > 2 1/4 and x ≤4
2 1/4 < x ≤ 4
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Peyton Cardenas
20 October, 23:33
0
2.25
Step-by-step explanation:
12x-39≤9 ⇒ 12x≤ 48 ⇒ x≤4
-4x+3<-6 ⇒ - 4x 9/4 = 2.25
2.25
or
x = (2.25, 4]
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