Question

Enter the number that makes the equation true.0.4+3/10=?/10+3/10

Answer 1

`\begin{gathered} 0.4+(3)/(10)=(x)/(10)+(3)/(10) \\ 0.4+0.3=(x)/(10)+0.3 \\ 0.7-0.3=(x)/(10) \\ \\ 0.4=(x)/(10) \\ x=0.4*10 \\ x=4 \\ \\ \text{the number is 4} \end{gathered}`