Hello,
Example,
2 (x+3)=12x
We divide with 2 at everywhere.
2 (x+3)/2=12x/2
x+3=6x
Now x, be -x.
3=6x-x
3=5x
Wè divide with 5.
3/5=5x/5
3/5=x
Answer the questions.
9 (30+a)=99
We divide with 9.
9 (30+a)/9=99/9
30+a=11
Now 30, be -30.
a=11-30
a=(-19)
#Tr
Good lessons!
