Question

x-3y=7
-2x+6y=4 solve in elimination​

Answer 1

Answer:

Step-by-step explanation:

2x+3y=8 eqn 1

4x+6y=7 eqn2

eqn 1st multiply by 2

4x+6y=16. eqn 3

Now

eqn 3 and eqn 2 added

0=9

It is not true

Hence, this equation has no solution

Answer 2

Answer:

{x,y} = {3,4/3}

Step-by-step explanation:

// Solve equation [1] for the variable x

[1] x = -3y + 7

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

[2] 4•(-3y+7) - 6y = 4

[2] - 18y = -24

// Solve equation [2] for the variable y

[2] 18y = 24

[2] y = 4/3

// By now we know this much :

x = -3y+7

y = 4/3

// Use the y value to solve for x

x = -3(4/3)+7 = 3

Solution :

{x,y} = {3,4/3}

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