Question

What is the value for x in the proportion x\x+10=7\12

Answer 1

\(\color{Black}{\Rightarrow \Large {a \over b} = {x \over y} \Longrightarrow ay = bx }\)

Answer 2

\[\frac{x}{x+10} = \frac{7}{12}\] cross multiply

Answer 3

\(\color{Black}{\Rightarrow 7(x + 10) = 12x }\)

Answer 4

Distribute first.

Answer 5

\[\LARGE \Rightarrow a(b \pm c) = ab \pm ac\]

Answer 6

when i cross multily I got 12x\70x

Answer 7

How so? o.O