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Verified answer
Mapel : MatematikaKelas : VIII SMP
Bab : SPLDV
Pembahasan :
B = A + 30
A = 2/5B + 75
Substitusi...
B = A + 30
B = 2/5B + 75 + 30
B - 2/5B = 105
3/5B = 105
B = 175 juta
B = A + 30
175 = A + 30
A = 145 juta
Maka...
A + B = 145 + 175 = 320 juta
Verified answer
Uang B = uang A + 30 juta → B = A + 30 juta ...pers.1Uang A = uang B + 75 juta → A = B + 75 juta ...pers.2
Jumlah uang A dan uang B?
A - B = -30 juta
A - B = 75 juta
___________________-
-B = -105 juta
B = -105 juta ×
B = 175 juta
A - B = - 30 juta
A - 175 juta = -30 juta
A = -30 juta + 175 juta
A = 145 juta
A + B = 145 juta + 175 juta = 320 juta
Maka jumlah uang A dan uang B adalah 320 juta (E)