-30-5x=-4x-6(5+4x)
First, you need to use the distributive property on the right to get -30-5x=-4x-30-24x
Then, you can add like terms to get -30-5x=-30-28x
Then, you can add 30 to both sides and add 5x to both sides to get 0=-23x
Finally, you divide both sides by -23 to get 0=x
x= number of boys in the club because it is unknown.
x + 7= the number total number of girls in the club.
549 ÷ 67 = 8.194029851
Hope this helps :)
First find the difference that went by subtracting the 2 numbers:
340 - 306 = 34
divide that by the number of students that went to the first dance:
34 / 340 = 0.1 = 10% decrease
