On a class trip there wre 30 more girls than boys.The total number of students on the trip was 210.Write and solve an equation to find the number of girls and the number of boys on the class trip.

Let b = the number of boys.

b + b + 30 = 210

2b = 180

b = 90

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To find the number of girls and boys on the class trip, we can set up two equations based on the given information.

Let's assume the number of boys on the trip is x. Therefore, the number of girls would be x + 30 (as there were 30 more girls than boys).

Now we can set up the equations:

Equation 1: x + (x + 30) = 210
This equation represents the total number of students on the trip, which is 210.

Equation 2: x + 30 = number of girls
This equation represents the number of girls on the trip.

To solve these equations, we can simplify Equation 1:

2x + 30 = 210
Subtract 30 from both sides of the equation:

2x = 180

Divide both sides of the equation by 2:

x = 90

Now, we can substitute x=90 into Equation 2:

90 + 30 = 120

So, there were 90 boys and 120 girls on the class trip.