Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
Pages: 1
#1 2019-05-26 00:54:29
- Algabre
- Guest
/Solve expression
7x-1=20
Help me please, thanks
#2 2019-05-26 01:00:02
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 46,154
Re: /Solve expression
Hi Algabre,
7x-1=20.
7x=20+1.
7x=21.
x=3.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
Offline
#3 2019-05-26 01:13:18
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,134
Re: /Solve expression
hi Algabre
Welcome to the forum.
Here's a way that works for equations like these.
Draw function boxes to show what is happening to x, going left to right.
Then do the opposite starting with 20 and going right to left.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
Offline
Pages: 1