Question

T - 3k = 5
2k + t = 5
tolong kerjakan lagi soal SPLDV ini dengan metode substitusi

Answer 1

Mencari nilai k :
>> T - 3k = 5
T = 5 + 3k
>> 2k + t = 5
2k + 5 + 3k = 5
2k + 3k + 5 = 5
5k = 5 - 5
5k = 0
k = 5

mencari nilai t :
>> T = 5 + 3k
T = 5 + 3(5)
T = 5 + 15
T = 20

pembuktian :
>> T - 3k = 5
20 - 3(5) = 5
20 - 15 = 5