I need help in this sum plss
2 answers:
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Answer:
<em>There are 12 boys and 18 girls</em>
Step-by-step explanation:
<u>Equations</u>
There are 30 students in a class. Let's call:
x = number of boys
Since the sum of boys and girls is 30:
30 - x = number of girls
The ratio of boys to girls is 2:3, thus:
Crossing denominators:
3x = 2(30 - x)
Operating the parentheses:
3x = 60 - 2x
Adding 2x:
5x = 60
Dividing by 5:
x = 60/5 = 12
x = 12
There are 12 boys and 30-12=18 girls
Greetings!
Solve the System, using Elimination:
Multiply Equation #2 by 2:
Eliminate variable x:
Divide both sides by 4:
Input this value into one of the Equations:
Simplify:
Divide both sides by 4.
The Solution to this System (The Point of Intersection):
I hope this helped!
-Benjamin
Solve the System, using Elimination:
Multiply Equation #2 by 2:
Eliminate variable x:
Divide both sides by 4:
Input this value into one of the Equations:
Simplify:
Divide both sides by 4.
The Solution to this System (The Point of Intersection):
I hope this helped!
-Benjamin