Question 498965
L1: 4x+6y+4z=30  --> 2x+3y+2z=15
L2: 6x+y+z=16
L3: 3x+2y+12z=24
L4(L1*3): 6x+9y+6z=45
L5(L4-L2): 8y+5z=29
L6(2*L3 - L2): 3y+23z=32
L7(8*L6 - 3*L5): 169z=169
z=1
8y=24
y=3
6x+4=16
x=2