Question

menggunakan metode Eliminasi
soal:
1). 3x+y=17
x-y= 3


2). 2x+5y =1
2x+y=5


#Tolong dgn cara penyelesaian nya ya!#




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Answer 1

Jawaban nomor 1
3x + y = 17
x − y = 3
—————— −
2x + 2y = 14
—————— ÷2
x + y = 7
x = 7 - y

Subtitusikan x = 7 - y
3x + y = 17
3(7 - y) + y = 17
21 - 3y + y = 17
21 - 17 = 3y - y
4 = 2y
y = 4/2
y = 2

Subtitusikan y=2
x - y = 3
x - 2 = 3
x = 3 + 2
x = 5

Jadi, y = 2 dan x = 5

Jawaban nomor 2
2x + 5y = 1
2x + y = 5
—————— −
4y = -4
y = -4/4
y = -1

Subtitusikan y = -1
2x + y = 5
2x + (-1) = 5
2x = 5 + 1
2x = 6
x = 6/2
x = 3

Jadi, y = -1 dan x = 3

Answer 2

Jawaban

1) x = 7

y = 2

2) x = 3

y = -1