Subject :IMO Class : Class 7
Ans 1:
Class : Class 7
Let the no. Be x
5(4+x)-20/8=10
20+5x-20/8=10
5x/8=10
5x=10×8
5x=80
X=80/5
X=16
According to me.
Ans 2:
Class : Class 7
Equation: ((5(4+n))- 20)/8= 10
= (5(4+n))- 20= 10x8
= 5(4+n)= (10x8)+ 20
=4+n= (10x8+20)/5
=n= ((10x8+20)/5)- 4
=n= (100/5)- 4
=n= 20- 4
n=16