Question

Resolva as equações:
a)10x-3=15x-4
b)7x+18=5x-12
c)x+2=3x-26
d)9x-6=x-10+3x
e)2(x+1)=5x+6
f) 4x-1=3(x-1)​

Answer 1

Resposta:

a)10x-3= 15x-4

10x-15x= -4+3

-5x= -1

x= -1

----

-5

x= 0,2

b)7x+18=5x-12

7x-5x= -12-18

2x= -30

x= -30

----

2

x= -15

c)x+2=3x-26

x-3x= -26-2

-2x= -28

x= -28

-----

-2

x= 14

d)9x-6=x-10+3x

9x-4x= -10+6

5x= -4

x= -4

---

5

x= 0,8

e)2(x+1)=5x+6

2x+2=5x+6

2x-5x= 6-2

-3x= 4

x= 4

---

-3

x= -1.3333333333

f) 4x-1= 3(x-1)

4x-1= 3x-3

4x-3x= -3+1

-2x= -2

x= -2

----

-2

x= 1