Question

a) 3x + 4x = 70
b) 6x – 5 x = 12
c) 2x + 7x = 81
d) 8x – 3x = 25
e) 12x + x = 39

Answer 1

Resposta:

a) 3x + 4x = 70

7x = 70

x = 70/7

x = 7

b) 6x – 5 x = 12

x = 12

c) 2x + 7x = 81

9x = 81

x = 81/9

x = 9

d) 8x – 3x = 25

5x = 25

x = 25/5

x = 5

e) 12x + x = 39

13x = 39

x = 39/13

x = 3