Question 650670
1) x^2+1=3

x^2=2

x= 2 1/2

x= -2 1/2

The answer is: 2 1/2, -2 1/2

2) x+4+5+1 

The answer is: x+10

3) 6x=12

6x/6=12/6

x=2^2*3/ 2*3

x=2^2-1

The answer is: x=2