Question

Q7. When 3 is subtracted from length and breadth of the rectangle, the perimeter becomes 30.What is the mathematical form of the statement?

a. x - y = 8
b. x + y = 21
c. x + y = 23
d. x - y = 9

anewer quickly please​​

Answer 1

Answer:

x+y=21

Step-by-step explanation:

2{(X-3)+(Y-3)}=30

2(X-3+Y-3)=30

2(X+Y-6)=30

2(X+Y)=30+12

2(X+Y)=42

X+Y=42÷2

X+Y=21

Answer 2

Answer:

Step-by-step explanation: