The ratio of girls to boys in liza’s classroom is 5 to 4 . how many girls are in her classroom if there is a total of 27 students?

15 girls

Step-by-step explanation:

Let

x> the number of girls

y> the number of boys

we know that

> equation A

isolate the variable y

> equation B

Substitute equation B in equation A

you welcome  

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions