Question

solve the following using addition...

2/3 x- 4/3y = 1/2

-4x-8y=10

Answer 1

did u try to do this problem

Answer 2

struggling with this section

Answer 3

Angela did one for you....
I'll give u a hint : multiply the first equation by -6 and then add second to the result

Answer 4

2/3 x- 4/3y = 1/2 -------------- (1)

-4x-8y=10 ---------------- (2)

multiply (1) by -6 and tell me what u get...

Answer 5

-4x+8y=-3

Answer 6

so y= -7/8

Answer 7

yes then solve it rhoff

Answer 8

No, no, how can u get y = -7/8????

Answer 9

call the equation u got as (3)

now add (3) and (2), n see what u get

Answer 10

-4x-8y=10 ------------- (2)

-4x+8y=-3 --------------(3)

Answer 11

-8x=7

Answer 12

x=-7/8

Answer 13

Correct !!!

so put x = -7/8 in (2) to get value of y...

Answer 14

i get y=-27/8

Answer 15

check again...

Answer 16

sry y= 27/8

Answer 17

-4x-8y=10 ------------- (2)

-7
-4 * ----- - 8y = 10
8

28 7
-- - 8y = 10 ==> ---- - 8y = 10
8 2

7 20 - 7 13
-8y = 10 - ----- ==> -8y = --------- ==> -8y = -----
2 2 2
13 13 - 13
y = -------- = ------ = -----
2 * -8 -16 16

Answer 18

is it clear now????

Answer 19

it is - and then i express the answer as (-7/8, -13/16) - or do I need to make them whole numbers?

Answer 20

Yes, u put the answer in (x,y) form as (-7/8, -13/16)

Answer 21

thank you so much. for some reason anytime fractions are included I really struggle. All the examples the teacher (and the book, and tutor sites) use are nice and clean - it's hard to see if I'm doing it right when the examples don't reflect the actual problems.

Answer 22

I guess now u hv learnt how to handle fractions !!!! :D
Don't come here asking for answers.
State clearly that u need to be guided how to solve the question.....