A. 5+x=17, x = 17-5=12
B. x = 4 x 2.5 = 10
C. x = 27+12 = 39
D. x = 16:4 = 4
E. x = 9 : 3/4 = 12
Answer A and E
(B) x = 40
Step-by-step explanation:
4x + 20 = 180
4x = 160
x = 40