Question

3)resolva as equações:


a)5(x+12)=x
b)4(x-1)=2(x-4)
c)2x=5(x+3)
d)5(1-x)-2x+1=3(2+x)
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Answer 1

Resposta:

a) 5(x+12)= x

5x+60= x

5x-x= -60

4x= -60

x=-15

b) 4(x-1)=2(x-4)

4x-4= 2x-8

4x-2x= -8+4

2x= -4

x= -2

c) 2x= 5(x+3)

2x= 5x+15

2x-5x= 15

-3x= 15

x= -5

d) 5(1-x)-2x+1= 3(2+x)

5-5x-2x+1= 6+3x

6-7x= 6+3x

-7x= 3x

-7x-3x= 0

-10x= 0

x= 0