Subject: i don't know how to find the value of "x"
Name: Ashley
Who are you: Student

4/7x+3=15

Ashley,

I'm not sure if you mean

⁴/_7x + 3 = 15 or ⁴/₇ x + 3 = 15

I am going to assume it is the second. ⁴/₇ x + 3 = 15.

You want to manipulate the equation, always maintaining an equality and end with x on the left of the equal sign and a number on the right. I would first subtract 3 from both sides. This gives

⁴/₇ x + 3 = 15
⁴/₇ x + 3 - 3 = 15 - 3
⁴/₇ x = 12

The difficulty now is the fraction o the left side so multiply both sides by 7.

⁴/₇ x = 12
7 ⁴/₇ x = 7 12
4x = 84

Finally divide both sides by 4

4x = 84
4x/4 = 84/4
x = 21

I hope this helps,
Penny