There are 40 children on a bus, there are 12 more boys than girls, how many girls are there on the bus?
b = boys
g = girls
There are 40 children on a bus mean:
b + g = 40
There are 12 more boys than girls mean:
b = g + 12
b + g = 40
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Remark:
You know:
b = g + 12
Replace this value in equation:
b + g = 40
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g + 12 + g = 40
2 g + 12 = 40
Subtract 12 to both sides
2 g + 12 - 12 = 40 - 12
2 g = 28
Divide both sides by 2
g = 28 / 2 = 14
14 girls
To find the number of girls on the bus, we need to determine the total number of boys and the difference between the number of boys and girls.
Let's assume the number of girls on the bus is represented by 'g'. Since there are 12 more boys than girls, the number of boys can be represented as 'g + 12'.
We know that the total number of children on the bus is 40. So, we can set up the equation:
g + (g + 12) = 40
To solve for 'g', we can simplify the equation:
2g + 12 = 40
Subtracting 12 from both sides:
2g = 40 - 12
2g = 28
Dividing both sides by 2:
g = 28 / 2
g = 14
Therefore, there are 14 girls on the bus.