Question

Resolva as equações abaixo:
a)4x-7=1
b)x+2=5
c)2y-4=2
d)2a+4=-6
e)-2+5y=13
f)x+1=3
g)2x-3=8
h)4-9x=2
i)3z-7=12
j)10-5x=3 x +1
k)2x+6=-3x+1
l)2y-5=1-4y
m)15y-2+3y=7
n)-2+3x+2=3
o)6y-1+2y=7y

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Answer 1

Resposta:

a)4x-7=1

4x = 1 + 7

4x = 8

x = 8/4

x = 2

b)x+2=5

x = 5 - 2

x = 3

c)2y-4=2

2y = 2 + 4

2y = 6

y = 6/2

y = 3

d)2a+4=-6

2a = - 6 - 4

2a = - 10

a = - 10/2

a = -5

e)-2+5y=13

5y = 13 + 2

5y = 15

y = 15/5

y = 3

f)x+1=3

x = 3 - 1

x = 4

g)2x-3=8

2x = 8 + 3

2x = 11

x = 11/2

h)4-9x=2

- 9x = 2 - 4

- 9x = - 2 .(-1)

x = 2/9

i)3z-7=12

3z = 12 + 7

3z = 19

z = 19/3

j)10-5x=3 x + 1

- 5x - 3x = 1 - 10

- 8x = -9 .(-1)

x = 9/8

k)2x+6=-3x+1

2x + 3x = 1 - 6

5x = -5

x = -5/5

x = -1

l)2y-5=1-4y

2y + 4y = 1 + 5

6y = 6

y = 6/6

y = 1

m)15y-2+3y=7

15y + 3y = 7 + 2

18y = 9

y = 9/18

y = 1/2

n)-2+3x+2=3

3x = 3 + 2 - 2

3x = 3

x = 3/3

x = 1

o)6y-1+2y=7y

6y + 2y - 7y = 1

y = 1