## babystar16 3 years ago the sum of 2 numbers is 25. and their difference is 7. find the number.

1. LukeBlueFive

This is equivalent to the following series of equations: $x + y = 25$ $x = y - 7$ So, substitute the second equation into the first: $(y - 7) + y = 25$ Simplify, and you'll have y. Then, plug that value of y into the second equation to get x.

2. babystar16

ty

3. LukeBlueFive

yw

4. pkjha3105

x+y=25 x-y=7....on solvng.. x=16,y=9

5. babystar16

ok got a new question

6. babystar16

the length of a rectangle is 5 more than twice the width. the permiter is 130 in. what is the area

7. pkjha3105

8. pkjha3105

5b+b=130 bredth=21.6 length=108.4

9. pkjha3105

area=lb=2341.4

10. pkjha3105

sory...b=10.8 i=54.2 area=587

11. LukeBlueFive

This equation gives the perimeter of a rectangle: $2 \times length + 2 \times width$ In this case, the following is true as well: $length = 2 \times width + 5$ Substitute this into the first equation and solve like the previous problem.

12. LukeBlueFive

Then multiply the length times the width to get the area, since: $Area = length \times width$ Gives the area of a rectangle.

13. pkjha3105

hey u got the sol @babystar 16

14. babystar16

ty