Question

Resolva as questões:
a) 3x+1=16

b)x/4-1=5/6

c)x-1+7=5x

d)8x-x=9-3x

Por favor,contas armadas. Obrigada !

Answer 1

a)3x=16-1=15\x=15\3=5

Answer 2

a) 3x + 1 = 16

3x = 16 - 1 = 15

x = 15/3 = 5

b) x/4 - 1 = 5/6  

x/4 = 5/6 + 1 = 11/6

x = 44/6 = 22/3

c) x - 1 + 7 = 5x

x - 5x = 1 - 7

-4x = -6

4x = 6

x = 6/4 = 3/2

d) 8x - x = 9 - 3x

8x - x + 3x = 9

10x = 9

x = 9/10