Question

3x + y = 2 and 9x + 2y = 7 by solving linear equations in two variables by substitution

Answer 1

Answer:

Step-by-step explanation:

9(3x + y = 2)

3( 9x +2y = 7)

Which is

27x +9y = 18

27x + 6y = 21

By subtracting the 2 equations...

We get,,

Y = -1 And. X = 1/3

Answer 2

Hey mate........
here is your answer.......

3x+y=2
=>y=2-3x ->(i)

9x+2y=7
=>9x+2(2-3x)=7. (from i)
=>9x+4-6x=7
=>3x=3
=>x=1 ->(ii)

(i)=>y=2-3x
=>y=2-3(1). (from ii)
=>y=2-3
=>y=-1

therefore, the required values of x and y are 1 and -1 respectively.

HOPE IT WILL HELP YOU.......
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THANK YOU ........❤️