Question

Derek bought 6.00 worth of 21 cent stamps and 41 cent stamps.

Answer 1

we have the expression

`0.21s+0.41(s-2)=6.00`

Solve for s

that means ----> isolate the variable s

`0.21s+0.41s-0.82=6.00`

Combine like terms

`\begin{gathered} 0.62s=6.00+0.82 \\ 0.62s=6.82 \end{gathered}`

Divide by 0.62 both sides

`\begin{gathered} s=(6.82)/(0.62) \\ s=11 \end{gathered}`