Question

If x=2/3,y=3/4,z=-1/5 . find the value of the expression (x-y)-z=x-(y-z). also examine the equality of these expressions?? ​

Answer 1

Substituting x=1, y=2 and z=5 in the given expression, we get

xy+yz–zx=(1)(2)+(2)(5)–(5)(1)

=(1×2)+(2×5)–(5×1)

=2+10−5

=12–5

=7

∴xy+yz−zx=7

Answer 2

Answer:

$\huge\bold\red{Solutions→}$

$x = \frac{2}{3} , \: y = \frac{3}{4} , \: z = \frac{ - 1}{5}$