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24/x = 30/45
x = 24×45/30
x = 36
36-24 = 12 pekerja (B)
2. 3x-2y=10
2y = 3x-10
y=(3/2)x -5
maka m= 3/2
24 → 45
n ← 45-15 = 30
maka,
24/n = 30/45
30.n = 24.45
30.n = 1080
n = 1080:30
n = 36
jadi, tambahan pekerja
= 36-24
= 12 orang ... (b)
2)
3x-2y = 10
a = 3 dan b = -2
maka,
gradien garis (m)
= -a/b
= -3/-2
= 3/2
atau
= 1 1/2