34y+56z+42n-13y+7z-5n= y=7 z=8 n13
34y+56z+42n-13y+7z-5n=
y=7
z=8
n13
n = 13 z = 8 y = 7 34y + 56z + 42n - 13y + 7z - 5n = 21y + 63z + 37n = 21 * 7 + 63 * 8 + 37 * 13 = 147 + 504 + 481 = 1132
34*7+56*8+42*13-13*7+7*8-5*13=238+448+546-91+56-65=1132