Question

[dương đức hùng]

a) (9x + 2) x 3= 60

b) 71+(26-3x):5=75

c) (x-6)^2 = 9

d) 1+3+.......+x= 465

e)2^x=3^2

h)16:x-1

g) 5^2x-3=5^2x3

Answer 1

[Nguyễn Tùng Chi]

a)(9x+2)x3=60

        9x+2 =60:3

        9x+2  =20

              9x =20-2

              9x=18

                x=18:9

                 x=2

Answer 2

[tran dinh binh]

a,x=2

b,x=2

c,x=9