Question

The formula for the perimeter of a rectangle is P = 2l + 2w. Find w if P = 68 and l = 10.

Answer 1

2w=p-2l
putting valuse of p&w
2w=68-2*10
2w=68-20
2w=48
w=24

Answer 2

good answer.

Answer 3

w=24

Answer 4

this is all about substitutions,as in,we are going to replace all the known values of the symbols in the equation:
if p=2(l+w)
p/2=l+w
therefore w=(p/2)-l

thus;making substitutions we have;
68=2(w+10)
34=10+w
w=34-10
w=24