4x + 3y =47 dan 3x + 2y = 34 masukan kedalam metode subsitusi

4x + 3y = 47 x3
3x +2y = 34. x4
menjadi
12x + 9y = 141
12x + 8y = 136
--------------------- -
y = 5
mencari x ---- dimasukkan
12x + 8y = 136
12x + (8*5) = 136
12x + 40 = 136
12x = 136 - 40
12x = 96
x = 96/12
x = 8
jadi x, y = 8,5

4x + 3y = 47 *2
3x + 2y = 34 *3

8x + 6y = 94
9x + 6y = 102      -

-x = -8 *-
x = 8  subsitusikan ke x 
4x + 3y = 47
4(8) + 3y =  47
32 + 3y = 47
3y= 47-32
3y = 15
y = 15/3
y = 5
jadi x= 8 dan y = 5