S= kr^(2)+krl, for k
i've been trying to solve it but i keep getting different answers. if someone can show me the steps in getting the answer; i'll appreciate it.

Start with

Factor k on the right hand side:

Assuming , divide both sides by this quantity:

Simplify the right hand side:

And thus we have solved the expression for k:

i think 1: 2

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk