Question

it is known that w+X+y=100and that w+x= z show that z+y=100​

Answer 1

Answer:

Step-by-step explanation:

Two equations, and three unknowns - you really cannot solve them for definite values can you? The best you can do is eliminate by multiplying through the first equation by  50  and subtracting from the second. You get: x+y+z=100

−40y−49z=−4500

Now, you can express x and y in terms of z, like this.

y=49z−450040,x=8500−89z40

Answer 2

Answer:

GIVEN that

w+x+y=100 -eq 1

w+x= z  -eq2

sub 2 in 1

then ,

z+y =100

LHS =RHS

hence, proved.