nilai dari a-b jika 4/7 = 12/a = b/35

[tex] \frac{4}{7} = \frac{12}{21} = \frac{20}{35} [/tex]
a - b = (7 × 3) - (4 × 5)
a - b = 21 - 20
= 1

4/7 = 12/a
4a = 84
a = 21

4/7 = b/35
7b = 140
b = 20

a-b
21-20
1

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