Question

3x + 4y = -2
2y - x = -19
what is the solutions ( x , y ) to the system of equations above? ​

Answer 1

Jawab:

(x,y)=(3,-8)

Penjelasan dengan langkah-langkah:

Consider the equations

3x + 4y=-23….(1) and 2y - x =-19….(2)

3*(2)=> 6y - 3x = -57

(1) => 4y + 3x =-23

Adding the above equations we get

(6y - 3x) + (4y + 3x)=-57–23

10y = -80

y=-80/10

y= -8

Put the value of y in equation (2) we get

2(-8)-x =-19

-16 - x =-19

-x =-19+16

-x =-3

x= 3

So the solution is (x,y)=(3,-8)

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