Question 152085
adding 1st eqn and 2nd eqn __ 3x+4z=-6 __ multiplying by 2 __ 6x+8z=-12


multiplying 2nd eqn by 2 and adding 3rd eqn __ 7x+8z=-10


subtracting eqns __ x=2


substituting __ 6(2)+8z=-12 __ subtracting 12 __ 8z=-24 __ z=-3


substituting __ (2)+y+(-3)=1 __ adding 1 __ y=2