d) At the most 6 girls can sit on a bench. What is the minimum number of
benches required for 45 girls?
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0
Answer:
The number of students is 48
Step-by-step explanation:
Let the number of students =
y
let the number of benches =
x
from the first statement
y
=
4
x
−
12
(three empty benches * 4 students)
from the second statement
y
=
3
x
+
3
Substituting equation 2 into equation 1
3
x
+
3
=
4
x
−
12
rearranging
x
=
15
Substituting the value for x in equation 2
y
=
3
⋅
15
+
3
=
48
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