diketahui sistem persamaan linier 3x+4y=-46dan 2x=5y.Nilai 4x-3y adalah....

Langsung aja y

3x + 4y = -46 (×2)
2x - 5y = 0 (×3)

6x + 8y = -92
6x - 15y = 0
___________-
23y = -92
y = -4

2x = 5y
2x = 5×(-4)
2x = -20
x = -10

Maka
= 4x - 3y
= 4(-10) - 3(-4)
= -40 + 12
= -28

Semoga berguna +_+

di.k :
3x+4y = -46
2x=5y

di.t :
4x-3y ... ?

jwb :
2x=5y
x = 5/2 y
↓
3x+4y= -46
3(5/2 y) + 4y = -46
15/2 y + 8/2 y = -46
23/2 y = -46
23y = -46 x 2
23y = - 92
y = - 92/23
y = -4
↓
2x = 5y
2x = 5(-4)
2x = -20
x = -10
↓
4x - 3y = 4(-10) - 3(-4) = -40-(-12) = -40+12 = -28