Jawaban:
3x+2y-2=0>>>3x+2y=2
x+y=6>>y=6+x
3x+(2×(6+x))=2
3x+12+2x=2
5x+12=2
5x=2-12
5x=-10
x=-2
y=6+x=6+2=8
8+(-2)×8=8-16= -8(a)
2.
4x+3y=43.000
2x+3y=29.000
----------------------- -
2x=14.000
x=7.000
(4×7000)+3y=43.000
28.000+3y=43.000
3y=43.000-28.000
3y=15.000
y=5.000
(b)
Penjelasan dengan langkah-langkah:
3. x + y = 6. >>>>>. X = 6 - y
3x + y - 2 = 0. >>>>>. 3x + y = 2
>>>>> 3 (6 - y) + y = 2. >>>>>. 18 - 3y + y = 2
>>>>> - 2y = 2 - 18. >>>>> y = -16/-2 = 8 = B
X = 6 - y = 6 - 8 = -2 = A
b + (a × b) = 8 + (-2 × 8) = 8 + -16 = -8 (A)
4. Bunga Daffodil = X
Bunga Gerbera = Y
Dik: 4x + 3y = 43. >>>> 3y = 43 - 4x
2x + 3y = 29. >>>> 2x + 43 - 4x = 29
>>>> -2x = 29 - 43 >>>> -2x = -14 >>>> x = -14/-2 = Rp7.000,-
3y = 43 - 4x
3y = 43.000 - 4(7.000) = 43.000 - 28.000 = 15.000
y = Rp5.000,-
