Question

Ditentukan sistem persamaan 3x+y = -5 dan 2x-3y = -7. Nilai 4x-2y?

Answer 1

Verified answer

3x + y = -5 |.3 => 9x + 3y = -15
2x - 3y= -7 |.1. => 2x -3y. = -7
11x = -22
x = -2

3x + 2y = -5
-6 + 2y. = -5
2y = -5 +6
y = ½

4x -2y = 4.-2 - ½.2
= -8 - 1
= -9
jadiin jawabn terbaik jga yahh

Answer 2

Verified answer

3x+y=-5   x2  -->6x+2y=-10
2x-3y=-7  x3 --> 6x-9y =-21


6x+2y=-10
6x-9y=-21
-----------------min
      11y=11
           y=1
3x+y=-5
     3x =-6
       x=-2

jadi 4x-2y = 4(-2)-2(1)
                 = -8-2
                  =-10