Question

Find the value of X and Y: X+Y=4 , -X+Y=10​

Answer 1

Answer:

$x + y = 4$

$- x + y = 10$

subtract

$x + y - ( - x + y) = 4 - 10$

$x + y + x - y = - 6$

$2x = - 6$

$x = \frac{ - 6}{2}$

$x = - 3$

put x in x+y=4

$- 3 + y = 4$

$y = 4 + 3$

$y = 7$

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Answer 2

Answer:

Answer:

x + y = 4x+y=4

- x + y = 10−x+y=10

x + y - ( - x + y) = 4 - 10x+y−(−x+y)=4−10

x + y + x - y = - 6x+y+x−y=−6

2x = - 62x=−6

x = \frac{ - 6}{2}x=

2

−6

x = - 3x=−3

put x in x+y=4

- 3 + y = 4−3+y=4

y = 4 + 3y=4+3

y = 7y=7