Answer:
180
Step-by-step explanation:
i just did it got it right
1) add 7 to both sides and get -5....so -5 >x
2) add 7 to both sides.....so get b<-5
3) add 17 to both side...so get z>1
6.40x+9.90(154-x)=1230.90
Solve for x
X=84 for child
154-84=70 for adults
I think it’s d for the standard equation