Question

please please please please please answer my question with solutions both

Answer 1

6)n=x
d=x+8
:n=x+18
d=x+8-1
=x+7
x+18/X+7=3/2
2(X+18)=3(X+7)
2x+36=3x+21
2x-3x=21-36
-x=-15
x=15
n=15
d=15+8
23
:15/23
(3)


7)sp=100
profit=20
%=?
:p/cp×100
cp=sp-p
100-20
80
;20/80×100
25%
(3)