Answer:
<u>=-26.7</u>
Step-by-step explanation:
=-13.9+(-12.8)
=-13.9-12.8
can u explain more
hmm ..
just transfer the X at the right side and others on left side
so you get
w-z = yx
so later
(w-z)/y = x
Ax=6
Y=12
Therefore a=6, x=1, y=12