Question

+ 3x - у = 20 ------- i
- 3х +6y = - 30 ------ii

find find the value of x and y​

Answer 1

Answer:

$3x - y = 20$

$- 3x + 6y = - 30$

$simplifying \: eq.2$

$3x - 6y = 30$

$3x - y = 20$

$subtracting \: eq.1 \: from \: eq.2$

$- 5y = 10$

$y = (- 2)$

$3x - ( - 2) = 20$

$3x + 2 = 20$

$3x = 18$

$x = 6$

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Answer 2

Hey brainly user!

Here is your answer...

3x-y=20

-3x+6y=-30

---------------------------

5y=-10

y=-2

Subsitute In i

3x-(-2)=20

3x+2=20

3x=18

x=6

x=6,y=-2