Question

Calcule a solução das seguintes equações, sendo U=Q


A) 28=9x+10
B)4x-4=20
C)3x-1 = 11
D)y+3=2y+1
E)5-x-22=4x-11-6x
F)20x-13=20+9x
G)17x-1=15x+3
H)7y-4=10
I)x+2x=42
J)3x=81

Answer 1

a) 28 = 9x + 10

28 - 10 = 9x

18 = 9x

x= 18/9

x=2

b) 4x - 4 = 20

4x = 20 + 4

4x = 24

x = 24/4

x = 6

c) 3x - 1 = 11

3x = 11 + 1

3x = 12

x = 12/3

x = 4

d) y + 3 = 2y + 1

3 - 1 = 2y - y

2 = y

e) 5 - x - 22 = 4x -11 -6x

-x -4x +6x = -11 -5 +22

x = 6

f) 20x-13=20+9x

20x -9x = 20 + 13

11x = 33

x = 33/11

x = 3

g) 17x-1=15x+3

17x - 15x = 3 + 1

2x = 4

x = 4/2

x = 2

h) 7y-4=10

7y = 10 + 4

7y = 14

y = 14/7

y = 2

i) x+2x=42

3x = 42

x = 42/3

x = 14

j) 3x=81

x = 81/3

x = 27

Espero ter ajudado ◉‿◉