Answer:
X=10
X=-8
Step-by-step explanation:
(x+1)*(x-3)=77
x²-3x+x-3=77
x²-2x-3=77
x²-2x-3-77=0
x²-2x-80=0
(x-10)*(x+8)=0
x-10 = 0
x=10
x+8=0
12
let x be the number of men
4:7 = x:21
4/7 = x/21
7x = 84
x = 12
$15.17
divide 34 by 32 = 1.0625. and divide it by the 7%= $15.17
