Kunci Jawaban Matematika Kelas 8 Halaman 43 Kurikulum Merdeka SMP MTs Soal Penguatan 2

2) 2x + 5y = 1
2x + y = 5
__________ -
4y = -4
y = -1

Maka,
2x + y = 5

2x -1 = 5

2x = 6

x = 3

3) -x +3y = -8
x - 4y = 9
_________ +
-y = 1

y = -1

Maka
x - 4y = 9

x + 4 = 9

x = 5