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biar salah satu variabel ada yang abis/ hilang caranya dikali
3x+2y=7 x1 3x+2y=7
x-y =4 x2 2x-2y=8
kan antara y nya dah sama...... karna tanda salah satu"y"nya min jadinya ditambah.... biar "y"nya abis
jadinya
5x=15
x=15/5
x=3
kan dah ketemu x nya baru cari y nya
x-y=4
3-y=4
-y=4-3
-y=1
y=-1
x - y = 4 |x2| 2x + 2y = 8
----------- -
x = -1
3x + 2y = 7 => 3(-1) + 2y = 7 => -3 + 2y = 7 => 2y = 7 + 3 => 2y = 10 => y = 5
HP = {-1, 5}