Tolong jawab ya.Nanti di kumpulin
Jawab: A+C=69
A=2/3.B
B=4/5.C maka C=5/4.B
Subtitusi A dan C
A+C=69
2/3.B+5/4.B=69
8/12B+15/12.B=69
23/12.B=69
B=69×12/23
B=36
A=2/3×36
=24
C=5/4×36
=45
Jawab:
a = 24, b = 36, c = 45
Pesan dengan langkah-langkah:
a + c = 69
a = 2/3 b …………….. b = 3/2 a
b = 4/5 c …………… c = 5/4 b
a + c = 69
2/3 b + 5/4 b = 69
8/12 b + 15/12 b = 69
23/12 b = 69
b = 69 : 23/12
b = 69 x 12/23
b = 36
a = 2/3 b
a = 2/3 x 36
a = 24
c = 5/4 b
c = 5/4 x 36
c = 45