Asked by MADAKI

ELIMINATION
8y+4x=7
6y-8x=41
Answered by MADAKI
ANSWER
Answered by MADAKI
REACTION
Answered by MADAKI
ELIMINATION
Answered by MADAKI
YES
Answered by oobleck
now you're just getting annoying ...
8y+4x=7
6y-8x=41
Double the 1st equation to get
16y+8x=14
6y-8x=41
Now just add the two equations to eliminate x
22y = 55
and finish it off from there.
Answered by Bosnian
Multiply first equation by 2

16 y + 8 x = 14

Add the result to the second equation.

16 y + 8 x = 14
+
6 y - 8 x = 41
_______________
22 y = 55

y = 55 / 22 = 11 • 5 / 11 • 2 = 5 / 2

Put this value in first equation.

8 y + 4 x = 7

8 • 5 / 2 + 4 x = 7

20 + 4 x = 7

Subtract 20 to bith sides.

4 x = - 13

x = - 13 / 4

You can write solution as:

( - 13 / 4 , 5 / 2 )





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