Question

Jika x-6y=-10 dan x-2y=18 maka x.y=

Answer 1

Lakukan eliminasi terlebih dahulu, dan menghasilkan x=32 dan y=7
maka x.y = 32*7 = 224

Answer 2

X - 6y = -10... pers (1) ,, x -2y = 18 ... pers (2)
=> x = -10 + 6y ... pers (3)
disubtitusikan ke pers (2)
x - 2y = 18
(-10+6y) -2y = 18
(-10) + 6y - 2y = 18
4y = 18 + 10
4y = 28
y =
y = 7
kemudian y = 7 disubtitusikan ke pers (1)
x - 6y = -10
x - 6(7) = -10
x - 42 = -10
x = -10 + 42
x = 32

maka 32 x 7 = 224