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3b = 180-103
b = 77/3
b=25,7
3b = 5a
3(25.7) = 5a
77 = 5a
77/5 = a
15.4 = a
a + b
15.4 +25.7 = 41,1
gambarnya tida terlalu jelas
4) 4x + 76 = 180
4x = 180-76
x = 26
7y = 104
y = 14.8
a =
luar berseberangan
b =
a + b =
=
no selanjutnya tidak terbaca...maaf...