Question

Resolva as equações abaixo:
(a) x + 1 = −7
(b) 2/3m + 3 = 0
(c) 3x − 1 = 2
(d) 4x − 2 = 11x + 7
(e) −2a − 4 = −3a + 20
(f) −3/7z + 4z − 1 = z − 2z + 9
(g) x + x + x − x + x + −x − x − x − x + 2x = 2
(h) c − 1 =2/3
(i) m +1/2= −1/2

Answer 1

a)
x+1=-7
x=-7-1
x=-8

b)

2/3m+3=

m=-3/2/3

m=-3.3/2

m=-9/2

m=-4.5

c)

3x-1=2

3x=2-1

3x=1

x=1/3

d)

4x-2=11x+7

4x-11x=7+2

-7x=9

x=-9/7

e)

-2a-4=-3a+20

-2a+3a=20+4

a=24

f)

-3/7z +4z-1=z-2z+9

-3/7z+4z-z+2z=9+1

-3/7z+5z=10

-3z+5z/7=10

2/7z=10

z=10/2/7

z=10.7/2

z=35

g) x=2

h)c=-1

i) m=0