Soal SPLDV 2x+3y=20 1x+y=13

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Soal SPLDV
2x+3y=20
1x+y=13

2x+3y=20 …(1)
1x+y=13 …(2)
y=13 – x

substitusikan pers y ke pers 1
2x+3y=20
2x+3(13-x) = 20
2x+26-3x = 20
-x = 20-26
-x = -6
x = -6/-1
x = 6

substitusikan nilai x ke pers 2
1x + y = 13
1(2) + y = 13
2+y = 13
y=13-2
y= 11

jadi x = 6, y = 11

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