Tentukan penyelesaian persaman2 dibawah dengan cara substitusi,jika peubah(variabelnya) pada himpunan bilangan bulat a. 18=10-2m b.3 X y/2=-6 c.2(3x-1)=2(2x+3)
ImmanuelSinaga
A. 18 = 10 - 2m 18 - 10 = -2m 8 = -2m 8 : (-2) = m m = -4 b. 3 x (y/2) = -6 y = -6 : 3 x 2 = -4 c. 2(3x-1)=2(2x+3) 3x - 1 = 2x + 3 3x - 2x = 3 + 1 x = 4
18 = 10 - 2m
18 - 10 = -2m
8 = -2m
8 : (-2) = m
m = -4
b.
3 x (y/2) = -6
y = -6 : 3 x 2 = -4
c.
2(3x-1)=2(2x+3)
3x - 1 = 2x + 3
3x - 2x = 3 + 1
x = 4
18=10-2m
18-10=-2m
8=-2m
4=-m
m=-4
b.
3 x y/2 = -6
y/2 = -6 / 3
y/2 = -2
y= -2.2
y=-4
c
2(3x-1) = 2(2x+3)
6x - 2 = 4x +6
6x - 4x = 6+2
2x = 8
x= 4
bilangan bulat = bilangan cacah beserta negatifnya