Question

a) 150×=300 ? b)7×-14=21. c) 3×-5=4. d) 2×+9=81

Answer 1

oi!

a) 150x = 300

        x =300/150

       x = 2

b) 7x - 14 = 21

    7x = 21 + 14

    7x = 35

     x = 35/7

    x = 5

c) 3x - 5 = 4

   3x = 4 +5

  3x = 9

  x = 9/3

 x = 3

d) 2x + 9 = 81

   2x = 81-9

  2x = 72

  x= 72/2

 x = 36 

bons estudos!