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kari74 [83]
3 years ago
10

Can someone please help

Mathematics
1 answer:
Inga [223]3 years ago
3 0

Answer:

15 boys.

Step-by-step explanation:

A class constituting of boys and girls:

Has a total of 35 students.

The number of girls outnumber that of boys by 5.

Let the number of boys be x such that the number of girls is x + 5.

∴

x + x + 5 = 35

2x + 5 = 35

2x = 35 - 5 = 30

x = 30/2 = 15

So there are 15 boys and 35 - 15 = 20 girls.

*<em>I believe you can now solve the second question.</em>

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Lady_Fox [76]
Let's solve your system by substitution.
y
=
−
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for y:
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x
+
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x
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for
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x
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:
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x
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7
−
2
x
+
7
=
5
x
−
7
−
2
x
+
7
+
−
5
x
=
5
x
−
7
+
−
5
x
(Add -5x to both sides)
−
7
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7
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x
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+
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x
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7
y
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(
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(
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