Question

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

Answer 1

Answer:

x=7

Step-by-step 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:

$r = 7$