Answer:
x<12
Step-by-step explanation:
Use photo math ! It’s way better than this
First you would subtract x from both sides to move all the x's to one side
Then you would add 4 to both side to move all the non x's to one side
Lastly divide by negative 15 to have x by itself
9/-15 =-.6
So x as has root at x=-0.6
M + f + a = 82
m = 7a + 1
f = 1/2m.....f = 1/2(7a + 1).....f = 3.5a + 0.5
7a + 1 + 3.5a + 0.5 + a = 82
11.5a + 1.5 = 82
11.5a = 82 - 1.5
11.5a = 80.5
a = 80.5 / 11.5
a = 7......7 adults
m = 7a + 1
m = 7(7) + 1
m = 49 + 1
m = 50 <=== 50 male students
f = 1/2m
f = 1/2(50)
f = 25 <=== 25 female students
