if the length of a rectangle is decreased by 3 units and the breadth is increased by 4 units then the area will increase by 9 square units. represent situation as a linear equation in two variables.
Answers & Comments
abhi178
Let x is the length of rectangle and d is width then initial area =xy according to question , (x-3)(y+4)=xy+9 xy+4x-3y-12=xy+9 4x-3y=21
Answers & Comments
then initial area =xy
according to question ,
(x-3)(y+4)=xy+9
xy+4x-3y-12=xy+9
4x-3y=21
Answer:
21 is the correct answer....