Question

calcule o X

me ajudem !!!!!!​

Answer 1

a)

5x + x = 90

6x = 90

x = 15

b)

6x + 3x = 180

9x = 180

x = 20

c)

x + x + 30 + x = 90

3x = 60

x = 20

d)

5x + 10 + 2x + 20 = 90

7x = 60

x = 60/7