Question

X x 12 = 40 + 1,28

Answer 1

x=3,44

Answer 2

\(x\times12=40+1,28\\ \Rightarrow x\times12=41,28\\ \Rightarrow x=41,28:12\\ \Rightarrow x=3,44\)

Answer 3

3,44

Answer 4

x×12=40+1,28⇒x×12=41,28⇒x=41,28:12⇒x=3,44