Question

Find WX. Please help out

Answer 1

wy = wx + xy

wx = wy - xy

wy =12y----------(1)

wx =7y+4--------(2)

xy =21------------(3)

(2) = (1) - (3)

7y + 4 = 12y - 21

12y - 7y = 4 + 21

5y = 25

y = 25/5

y = 5

so wx = 7×5+4

=35+4

=39