Question

Encontre o valor de x nas equações abaixo:

× - 3 = 9

× +5 = 20 - 4×

2×-8=3×-10

8×=5+3

4×+12=2×-4

5×-7=2×+8

4×-9=1-2×

9×-4×+10=7×-30

3×-×=8​

Answer 1

Resposta:

x=12

x=3

x=2

x=1

x= -8

x=3

decimal

x=10

x=4

Explicação passo-a-passo:

Answer 2

Resposta:

a) x= 12

b) x= 3

c) x= 2

d) x= 1

e) x= -8

f) x= 5

g) x= 5/3

h) x= 20

i) x= 4

Explicação passo-a-passo:

a) x -3 =9

x= 9 +3

x=12

b) × +5 = 20 - 4×

x+4x= 20-5

5x =15

x=15/5 x=3

c) 2×-8=3×-10

2x -3x = -10 +8

-x = -2 .(-1)

x=2

d) 8×=5+3

8x= 8

x= 8/8 x=1

e) 4×+12=2×-4

4x-2x= -4 -12

2x = -16

x= -16/2 x= -8

f) 5×-7=2×+8

5x -2x = 8+7

3x = 15

x= 15/3 x=5

g) 4×-9= 1-2×

4x +2x = 1+9

6x = 10

x= 10/6 ÷2

x= 5/3

h) 9×-4×+10=7×-30

9x-4x-7x = -30 -10

-2x = -40 .(-1)

2x = 40

x= 40/2 x=20

i) 3×-×=8

2x=8

x= 8/2 x=4