Question

Resolva as equações:
a)4x-1=3(x-1)

b)3(x-2)=2x-4

c)2(x-1)=3x+4

d)3(x-1)-7=15

e)7(x-4)=2x-3

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

g)3(3x-1)=2(3x+2)

h)7(x-2)=5(x+3)

i)3(2x-1)= -2(x+3)

j)5x-3(x+2)=15

k)2x+3x+9=8(6-x)

l)4(x+10)-2(x-5)=0

m)3(2x+3)-4(x-1)=3

n)7(x-1)-2(x-5)=x-5

o)2(3-x)=3(x-4)+15

p)3(5-x)-3(1-2x)=42

q)(4x+6)-2x=(x-6)+10+14

r)(x-3)-(x+2)+2(x-1)-5=0

s)3x-2(4x-3)=2-3(x-1)

t)3(x-1)-(x-3)+5(x-2)=18

u)5(x-3)-4(x+2)=2+3(1-2x)

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Answer 1

Explicação passo-a-passo:

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

4x-1=3x-3

4x-3x=-3+1

x=-2

b)3(x-2)=2x-4

3x-6 =2x-4

3x-2x=-4+6

x=2

c)2(x-1)=3x+4

2x-2=3x+4

2x-3x=4+2

-x=6

(-1).-x=6

x=-6

d)3(x-1)-7=15

3x-3-7=15

3x=15+3+7

3x=25

x=25/3

x=8

(não sei se tá certa!!)

e)7(x-4)=2x-3

7x-28=2x-3

7x-2x=-3+28

5x=25

x=25/5

x=5

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

3x-3=12-4x

3x+4x=12+3

7x=15

g)3(3x-1)=2(3x+2)

9x-3=6x+4

9x-6x=4+3

3x=7

h)7(x-2)=5(x+3)

7x-14=5x+15

7x-5x=15-14

2x=1

x=1/2

x=1

i)3(2x-1)= -2(x+3)

5x-3=-2x-6

5x+2x=-6+3

7x=-3

j)5x-3(x+2)=15

5x-3x-6=15

5x-3x=15+6

2x=21

k)2x+3x+9=8(6-x)

2x+3x+9=48-8x

2x+3x+8x=48-9

13x=39

x=39/13

x=3

l)4(x+10)-2(x-5)=0

4x+40-2x+10=0

4x-2x=-10-40

2x=-50

x=-50/2

x=-25

m)3(2x+3)-4(x-1)=3

6x+9-4x+4=3

6x-4x=3-9-4

2x=-6-4

2x=-10

x=-10/2

x=-5

n)7(x-1)-2(x-5)=x-5

7x-7-2x+10=x-5

7x-2x-x=-5+7-10

4x=-8

x=-8/4

x=2

o)2(3-x)=3(x-4)+15

6-2x=3x-12+15

-2x-3x=-12+15-6

-5x=-1

-x=-1/5

(-1) .-x=-5

x=5

p)3(5-x)-3(1-2x)=42

(preguiça de fazer,_,)

q)(4x+6)-2x=(x-6)+10+14

(faça oc )

r)(x-3)-(x+2)+2(x-1)-5=0

x-3-x-2+2x-2-5=0

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

2x=12

x=12/2

x=6

s)3x-2(4x-3)=2-3(x-1)

3x-8x-6=2-3x+3

3x-8x+3x=2+3+6

6x-8x=11

-2x=11

(-1).-2x=11

2x=11

t)3(x-1)-(x-3)+5(x-2)=18

3x-3-x+3+5x-10=18

3x-x+5x=18-3+3+10(corta os 2 № 3(-3 &+3)

7x=18+10

7x28

x=28/7

x=4

u)5(x-3)-4(x+2)=2+3(1-2x)

5x-15-4x-8=2+3-6x

5x-4x-6x=2+3+15+8

5x-10x=28

(-1).-5x=28

5x=-28

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