Step-by-step explanation:
V= Iwh
v-h = Iw
<u>v-h</u> = I
w
:. I = <u>v-h</u>
Answer:
first one is simnple cross multiply and divide
12*7=4x
84=4x
x=21
2nd same process but more steps
7x=5(x+8)
7x=5x+40
7x-5x=40
2x=40
x=20
1363.2 / 16
=85.2