Question

Determine o conjunto solução em cada equação a seguir para U=Z
a) 2x-4+6=20
b)-15 +5x=25
c)-3x+(-1+4)=9
d)2x-(1+3-6)=12
e)3x+5=72
f)-x-8x=18
g)5x+2x+4x=121
h)7x-2=5x+10
i)x+1=5-x
j)4x+6=6x+10
Se poderem me ajudar agradeco <3

Answer 1

Explicação passo-a-passo:

a) 2x-4+6=20

2x + 2 = 20

2x= 20 - 2

2x= 18

x=18/2

x= 9

b)-15 +5x=25

5×= 25 + 15

5×= 40

×= 40/5

×= 8

c)-3x+(-1+4)=9

-3× + ( +3) =9

-3× +3 = 9

-3×= 9-3

-3 = 6 ( -1)

×= -6/3

×=-2

d)2x-(1+3-6)=12

2×-( -2) = 12

2× + 2= 12

2×= 12-2

2×= 10

×= 10/2

×=5

e)3x+5=72

3×= 72-5

3×= 67

×= 67/3

f)-x-8x=18

-9×=18 (-1)

×= -18/9

×= -2

g)5x+2x+4x=121

11×= 121

×= 121/ 11

×= 11

h)7x-2=5x+10

7x - 5×=10+2

2×= 12

×= 12/2

×= 6

i)x+1=5-x

×+×=5-1

2×=4

×=4/2

×=2

j)4x+6=6x+10

4×-6×=10-6

-2×= 4 (-1)

×= -4/2

×= -2