Question

a)2x-10=3x+40
b)12x-144=9x9
c)18x-220=3x+5
d)17x-186=3x+10
e)2x+5=27
f)4x-82x+6​

Answer 1

Resposta:

a)2x-3x=40+10

-x=50

x=-50

b)12x-144=9x(vezes 9 ou elevado a 9????)

c)18x-220=3x +5

18x-3x=220+5

15x=225

x=225/15

x=15

d)17x-3x=186+10

14x=196

x=196/14

x=14

e)2x=27-5

2x =22

x=11

f)4x-82x +6= ??

-78x=-6

x= -78/-6

x= 13

Explicação passo-a-passo:

b) Fazendo

12x-144= 9 x .9

12x-144=81x

12x-81x=144`

-69x= 144

x=-144/69

x=-2,08