Solving Equations

Question 1:

4x2=-1+5x
x =-1

Question 2:

8x2=52+2x
x =9

Question 3:

3x2=687x
x =7

Question 4:

10x+4=70x
x =6

Question 5:

9x+2=72x
x =7

Question 6:

10x9=46x
x =5