Question

Solve for x :
1 1 11
x + 4 - 7 = 20; x = -4, 7.​

Answer 1

x+4-7=20

by putting the value of x as -4

x-3=20

x=20+3

x=23

-4=23

-4 is not a root of x

x+4-7=20

7-7=20-4

0=16

7 is not a root of x

Thus, -4&7 is not a root of x