Diketahui sistem persamaan linear : 2x + 3y = 10, x + 4x = 10. Nilai dari 4x - 3y = ...

2x + 3y = 10. | x 1
x+ 4y = 10. | x 2

2x + 3y = 10
2x + 8y = 20
_________ -
-5y = -10
y = -10/-5= 2 disubstitusikan ke pers 2

x + 4y = 10
x + 4(2) = 10
x + 8 = 10
x = 10-8 = 2

Jadi 4x -3y = 4(2) -3(2) =
8-6=2