Question

Urgente !!!!!!!!!!!!!!!!!!
1-) Resolva as Equações , sendo U=Q ( Obss: Equações de 1Grau )

a) 2x-7 = 8

b) 5x - 7 = 2x + 2

c) 4y - 6 = 2y

d) 6y+30 = 2y-2

e) x + 1 = 7x - 2

f) 1 + 4(x - 5 ) = 0

g) 7x + 3 = 20 + 2x

h) 2m - 5 = 14 - 3m

Answer 1

a) 2x-7=8 2x = 8 + 7 2x = 15 x = 15 / 2 x = 7,5 

b) 5x-7=2x+2 5x - 2x = 2 + 7 3x = 9 x = 9/3 x = 3 

c) 4y-6=2y 4y - 2y = 6 2y = 6 y = 6/2 y = 3 

d) 6y+30=2y-2 6y - 2y = -2 - 30 4y = -32 y = -32/4 y = -8 

e) x+1=7x-2 x - 7x = -2 - 1 - 6x = -3 x = -3/-6 x = 1/3 

f) 1+4(x-5)=0 1 + 4x - 20 = 0 4x = 20 - 1 4x = 19 x = 19/4 x = 4,75 

g) 7x + 3 = 20 + 2x 7x-2x=20-3 5x=17x=17/5x=3,4

h) 2m-5=14-3m 2m + 3m = 14 + 5 5m = 19 m = 19/5 m  m= 3,8

Answer 2

a) 2x-7=8
2x=8+7
2x= 15
x=15/2 x=7,5

b) 5x-7=2x+2
5x-2x=5
3x=5
x=5/3

c)4y-6=2y
2y=6
y=3

d) 6y+30=2y-2
4y=-30-2
y=-32/4 y=-8

e) x+1=7x-2
-6x=-2-1
-6x=-3
x=2

f) 1+4x-20=0
4x=-1+20
4x=19
x=19/4

g)5x=20-3
5x= 17
x=17/5

h) 2m+3m= 14+5
5m=19
m=19/5