Question

resolva as equações abaixo

a) 3 x -4 = 11

b) 5 x + 4 - 2x = 26 - 3x

c) 4x + 9 = 3 x + 5

d) 7 (y - 1) =2 (3y - 1 )

e) 2 x + 1 + 5x - 15 = 3x + 3 + x

f) x + 1 x + 3x = 1320

g) 3 x + 50 = 2x + 200

h) 2 x + 10 = x + 8 + 10

i) 3 x + 2 = x - 3

j) 2 x -1 = x + 5

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Answer 1

a)3x - 4 = 11
3x = 11 +4
3x = 15
X= 15 : 3
X= 5

Answer 2

Vamos lá:

a) 3x-4 =11

3 x = 11+4

x= 15/3

x=5

b)5x+4-2x=26-3x

5x-2x+3x= 26-4

6x=22

x=22/6

x=3,6666...

c)4x+9=3x+5

4x-3x =5-9

x= -4

d)7 (y-1)=2(3y-1)

7y-7=6y-2

7y-6y= -7+2

x= -5

e)2x+1+5x-15=3x+3+x

2x+5x-3x-3x= 3+15

x= 18

f) x+1x+3x = 1320

5x=1320

x=1320/5

x=264

g)3x+50=2x+200

3x-2x = 200-50

x=150

h)2x+10=x+8+10

2x-x = 10+8-10

x=8

i)3x+2=x-3

3x-x= -3-2

2x = 5

x=5/2

x= 2,5

j) 2x-1=x+5

2x-x= 5+1

x=6