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4(A+2) = (B+2) + 36
A= 2B-6+3
A= 2B-3
4A+8= B+38
B=4A-30
A= 2(4A-30)-3
A=8A-60-3
A=8A-63
7A=63
A=9 tahun
2 th lg >> 4A=B+36
Skrg >> A=?
>> A-3 = 2(B-3)
A-3 = 2B-6
A-2B = -3
>> 4(A+2) = (B+2)+36
4A+8 = B+38
4A-B = 30
>> A-2B=-3 dan 4A-B=30
4A-8B=-12 dan 4A-B=30
(4A-4A)+[-8B-(-B)]=(-12-30)
-7B=-42
B = -42/-7 = 6
A >>> A-2B=-3
A-12=-3
A = -3+12 = 9
smoga membantu ya ^^ maaf klo ada yg salah :)