Question

What does the variable r represent in the equation 10r+4=8

Answer 1

The value of variable r in the equation
`10r+4=8` is
`\mathbf{r=0.4}`

Explanation:

We need to find the value of variable r in the equation
`10r+4=8`

Step 1: Write the equation

`10r+4=8`

Step 2: Subtract 4 on both sides

`10r+4-4=8-4\\10r=4`

Step 3: Divide both sides by 4

`(10r)/(10)=(4)/(10)\\r=0.4`

So, The value of variable r in the equation
`10r+4=8` is
`\mathbf{r=0.4}`