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Verified answer
Bab AljabarMatematika SMP Kelas VII
a + b = 27
a - b = 3
--------------- +
2a = 30
a = 15
a + b = 27
15 + b = 27
b = 27 - 15
b = 12
a . b = 15 . 12
a . b = 180
Verified answer
Bilangan 1 = xBilangan 2 = y
x + y = 27
x - y = 3
x - y = 3
- y = 3 - x
y = x - 3
x + y = 27
x + x - 3 = 27
2x = 27 + 3
2x = 30
x = 30/2
x = 15
y = x - 3
y = 15 - 3
y = 12
x × y
= 15 × 12
= 180
Jawaban : c. 180
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