Question

Justin has 16 new magazines to readi.Let M be the number of magazines the would have left to read after reading R of them.Write an equation relating Mr. R. Then use this equation to find the number of magazines he would have left to read after reading9 of them.Equation:금Х$?Number left to read after reading of them: magazines

Answer 1

Let M be the number of magazines Justin would have left to read after reading R of them, then we can set the following equation:

`M+R=16.`

If R=9, then:

`M+9=16.`

Solving the above equation for M we get:

`M=16-9=7.`

Answer: After reading 9 magazines, Justin has 7 left to read.