Answer:
Explanation:
Perimeter of the rectangle= 42 cm
Length= x
Breadth= y
2(x+y)= 42
x+y= 42/2= 21 (Let it be the first equation)
Perimeter of the triangle= 36 cm
x+y+2y-3= 36 cm (Let it be the second equation)
Substitute equation 1 in 2.
x+y+2y-3= 36
⇒ 21+2y-3= 36
2y= 36-21+3
2y= 18
y= 18/2
y= 9
x+y= 21
x+9= 21
x= 21-9
x= 12
∴ the values of x and y are 12 and 9 respectively.