Question

Solve for a: 4 a over 9 = 100 over 45.

Answer 1

\[\frac{ 4a }{ 9 } = \frac{ 100 }{ 45 }\]

Answer 2

so u know about cross multiplication?

Answer 3

No.

Answer 4

ok the thing is, if \[\frac{ a }{ b } = \frac{ c }{ d } => a . d = c . b \]

Answer 5

so can u try cross multiplication and make the equation ?

Answer 6

108 and 900?

Answer 7

45.4 = 180, not 108. :P

and ur multiplying with 4a,

so 45.4a = 180a, which is equal to 900.

Hence

\[180.a = 900.\]

Answer 8

if u can find a now?

Answer 9

Is it 5?

Answer 10

yes it is 5 :)