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maka 36 = 2((2x - 3)+x))
36 = 2(3x - 3)
36 = 6x - 6
6x = 36+6 = 42
x = 7
2. 2 bilangan ganjil berurutan dijumlah 100
maka bilangan tsb 49 dan 51
jd bil. tbesarnya ialah 51
3. sapi = x ; kambing = y
x = 10y
2x + 8y = 11.900.000
2(10y) + 8y = 11.900.000
28y = 11.900.000
y = 425.000
maka 1 sapi = 10 x 425.000 = 4.250.000