Question

Solve using the elimination method
5x+2y=-7
7x-3y=17

Answer 1

3 ( 5x +2y =-7)
2 ( 7x -3y =17 )

15x +6 y =- 21
14 x - 6 y = 34
eliminate
29 x = 13
x = 13 / 29

Answer 2

this ones good

Answer 3

multiply first by 7 and second by 5 to get

35x + 14y = -49 -----(3)
35x -15y = 85 -------- (4)
subtract (4) from (3) to eliminate the variable x

29y = -134
y = -134/29

now put y= -134/29 in the first equation

Answer 4

5 ( 13 /29 ) +2y = -7
2y = -7 - 65 / 39
2y = -273-65/39
y = 338 x 2 / 39
y = 676 /39

Answer 5

5x + 2*(-134/29) = -7
5x -268/29 = -7
5x = -7 + 268/29
5x = 65/29
x = 65/145

Answer 6

cancelling out common factors
x = 13/29

so solution is x = 13/29 and y = -134/29

Answer 7

@Asadkarim

yr calculation for y is wrong and hence y= 676/39 is wrong..

correct value of y is -134/29

Answer 8

yeah :(

Answer 9

no problem, we all make mistakes every now n then.....

Answer 10

rachelgreen, if u r satisfied with the answer, pls click GOOD ANSWER button for me :))

Answer 11

dnt wrry buddy good one

Answer 12

thanks vinit...........

Answer 13

tats done