Question

X+y= 8
2x - y= 7 solve by it as elimination method

Answer 1

Answer:

// Solve equation [1] for the variable y

[1] y = -x + 8

// Plug this in for variable y in equation [2]

[2] 2x - (-x +8) = 7

[2] 3x = 15

// Solve equation [2] for the variable x

[2] 3x = 15

[2] x = 5

// By now we know this much :

x = 5

y = -x+8

// Use the x value to solve for y

y = -(5)+8 = 3

( 5, 3 )

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