Let the number of boys be x
Let the number of girls be y
x=y+5
3y=2x+12
3y=2(y+5)+12
y=22
3×22=2x+12
x=27
(x, y)=(27, 22)
There are 27 boys and 22 girls.
Hope my answer helped u :)
Multiplication and division are opposites, or inverse operations
This should be 2x^2 + 7x - 4
X+15=8 Subtract 15 from both sides
x=8-15
x=-7
Remember that multiples are numbers that can be divided by a number without a remainder so in this case you could add 15 by 15 to find what number in this set is a multiple of 15.




Therefore your answer is "60."
Hope this helps.