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3y+y=3y
7-5=2
jawabnnya B
maaf kalau salah
3x + y = 7......(ii)
Eliminasi kedua persamaan
Pers. (ii) dikali 3
4x - 3y = 5
9x + 3y = 21
_________ +
13x = 26
x = 2
Substitusi nilai x ke dalam pers.(ii)
3x + y = 7
3(2) + y = 7
6 + y = 7
y = 1
A.
2x + 2 = 6
2(2) + 2 = 6
6 = 6
*benar*
B.
3y - 1 = 2
3(1) - 1 = 2
2 = 2
*benar*
C.
xy = 3
(2)(1) = 3
2 = 3
*salah*
D.
x/y = 2
2/1 = 2
2 = 2
*benar*