Who is asking: Student
Hi, could you help me with these questions:Find x & solve
Thanks for your help!
I will do the first problem and this should help get you started. I think that it helps to think of an equation as a balance. Here you have 7 - 2x/3 on one side of the balance and 9 on the other. The goal is to perform steps that maintain the balance and result with x on one side and some number on the other. That is you want x = ???
With this equation I would first multiply both sides by 3 since that will maintain the balance and eliminate the fraction.
3(7 - 2x/3) = 3(9)
3(7) - 3(2x/3) = 27
21 - 2x = 27
Your goal is to have only x on the left of the equal sign so subtract 21 from both sides, that is
21 - 2x - 21 = 27 - 21
-2x = 6
Finally divide both sides by -2 and the equation becomes
-2x/(-2) = 6/(-2)
x = -3