Tolong jawab yaa. selesaikan sistem persamaan linear dua variabel berikut ini a. y=-x+3 y=-x+5 b. x=2y+10 2x+3y=-1 c. x+y=3 x-y=-3 d. 2x-4y=10 -12x+24y=-60

a.
y = -x + 3
y = x + 5
_______-
0 = -2x - 2
2 = - 2x
x = -1

y = x + 5
y = -1 + 5
y = 4

b.
x = 2y + 10 >> x - 2y = 10 >> ×2
2x + 3y = -1 >> ×1
________________________
2x - 4y = 20
2x + 3y = -1
__________-
-7y = 21
y = -3

x = 2y + 10
x = 2 × (-3) + 10
x = -6 + 10
x = 4

c.
x + y = 3
x - y = -3
_______-
2y = 6
y = 3

x + y = 3
x + 3 = 3
x = 3 - 3
x = 0

d.
2x - 4y = 10 >> ×6
-12x + 24y = -60 >> ×1
__________________
12x - 24y = 60
-12x + 24y = -60
_____________

x = 7
y = 1

((coba-coba aja hehe))