Question

2/5 (3r+4) =10 solve for r

Answer 1

x=7

Explanation:

✯Hii✯

↪ expand the brackets

↪ then solve normally

↪ x will be 7

❤Kathy❤

Answer 2

For this case we have the following equation:

`\frac {2} {5} * (3r + 4) = 10`

We must clear the variable "r":

We multiply by
`\frac {2} {5} * (3r + 4) = 10` \ frac {5} {2} on both sides of the equation:

`\frac {2} {5} * \frac {5} {2} (3r + 4) = 10 * \frac {5} {2}\\3r + 4 = \frac {50} {2}\\3r + 4 = 25`

We subtract 4 on both sides of the equation:

`3r + 4-4 = 25-4\\3r = 21`

We divide between 3 on both sides of the equation:

`\frac {3r} {3} = \frac {21} {3}\\r = 7`

Answer:

`r = 7`