a)-14+3*(-8)=>-15-24=-39
b)32=2^5
18=2*3^2
(32,18)=2^5*3^2
=32*9
=288
c)x=300
d)x-10/100x=27
100x-10x=2700
90x=2700
x=2700:90
x=30
e)a/b=3/5
a+b=32
5a+3b=15(a+b)
15*32=480
f)15.....9
x......15
15/x=9/15=>x=25
g)(7a+3b)/(5a+b)=8/5
8(5a+b)=5(7a+3b)
40a+8b=35a+15b
5a=7b
a=7;b=5
b<a