Question

3x + 4y =10
1x - 1y =5​

Answer 1

Answer:

y= -5/7; x= 30/7

Step-by-step explanation:

1x-1y = 5

: 4x - 4y = 20

7x = 30

x= 30/7

y= x-5

: 30/7-5

= -5/7

Answer 2

Answer:

3x+4y=10 ...(1)

1x-1y=5 ....(2)

dividing equation (2) from both the sides

therefore, x+y=5

multiplying equation (2) from (3)

therefore, 3x-3y=15

subtracting equation (1) from (2)

3x+4y=10

3x-3y=15

7y=35

y=35

7

y= 5

substituting y=5 in equation (2)

1x+1y=5

therefore , 1x+1(5)=5

1x+5=5

1x=5-5

1x=0

therefore. x=1

answer (x,y) (1,5)

Step-by-step explanation:

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