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please help me i'm being timed

Please Help Me Im Being Timed class=

Sagot :

DᴀʀᴋPᴀʀᴀᴅᴏx

x - coordinate of the solution of given system of linear equations is :

  • -3

now, let's plug the value of x as -3 in the first equation, we get :

  • [tex] - x + y = 6[/tex]

  • [tex] - ( - 3) + y = 6[/tex]

  • [tex]3 + y = 6[/tex]

  • [tex]y = 6 - 3[/tex]

  • [tex]y = 3[/tex]

therefore, value of y = 3

correct choice - b

VirαtKσhli

Answer:

[tex] y = 3 [/tex]

Step-by-step explanation:

Given system of equations ,

[tex]\begin{cases} -x +y = 6\dots (i) \\ 2x -5y = -21 \dots (ii)\end{cases}[/tex]

2(i) + (ii) :-

[tex]\implies -2x +2y +2x -5y = -21+12 [/tex]

Simplify RHS and LHS ,

[tex]\implies -3y = -9 [/tex]

Divide both sides by -3 ,

[tex]\implies \boxed{ y = 3}[/tex]

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