Question

A)x+7=3,u=N B)X-3=2x, U=Q C)8-X=2+X,U=Z​

Answer 1

a)

x + 7 = 3

x = 3 -7

x = -4

b) x - 3 = 2x

x - 2x = 3

-x = 3 . (-1)

x = -3

c) 8-x=2+x

  -x - x = 2 -8

-2x = -6

-x = -6/2

-x = -3 . (-1)

x = 3