Question

answer it on notebook plz 7 th sum I will mark as brainliest no spam ​

Answer 1

Step-by-step explanation:

perimeter of rectangle=2(l+b)

5x-9y+2z=2{(3x-5z)+b}

5x-9y+2z=2(3x-5z+b)

5x-9y+2z=6x-10z+2b

5x-6x-9y+2z+10z=2b

-x-9y+12z=2b

x+9y-12z=-2b

b=x+9y-12z/-2

Answer 2

REFER TO THE ATTACHMENT FOR YOUR ANSWER.

here, we're given the measurements in the form of variables.

formula to find the perimeter is 2(l + b)

so, we can write as

➡ 2( l + b ) = 5x - 9y + 2z

next we can denote breadth by any variable. here I took breadth as a .

put all the values of length and breadth in place of l and b

then by simplifying, we get

breadth = (x + 9y - 12z)2 units