Question

conta de matematica
a)8×+1=3×+11=
b)3×+7=-4×-4=
c)6×+4=2×-12=
d)9×+2=6×-4=
e)8×+1= 6×+9=
​

Answer 1

Resposta:

Equação do 1° grau.

a)

8x + 1 = 3x + 11

8x - 3x = 11 - 1

5x = 10

$x = \frac{10}{5} \\ \\ x = 2$

b)

3x + 7 = - 4x - 4

3x + 4x = - 4 - 7

7x = - 11

$x = - \frac{ 11}{7}$

c)

6x + 4 = 2x - 12

6x - 2x = - 12 - 4

4x = - 16

$x = \frac{ - 16}{4} \\ \\ x = - 4$

d)

9x + 2 = 6x - 4

9x - 6x = - 4 - 2

3x = - 6

$x = \frac{ - 6 }{3} \\ \\ x = - 2$

e)

8x + 1 = 6x + 9

8x - 6x = 9 - 1

2x = 8

$x = \frac{8}{2} \\ \\ x = 4$

Bons Estudos!

Answer 2

Resposta:

Olá!!!

$a)8x + 1 = 3x + 11 \\ 8x - 3x = 11 - 1 \\ 5x = 10 \\ x = 10 \div 2 \\ x = 5$

$b)3x + 7 = - 4 x - 4 \\ 3x + 4x = 7 - 4 \\ 7x = 3 \\ x = 7 \div 3 \\ x = 2.3$

$c)6x + 4 = 2x - 12 \\ 6x - 2x = 12 - 4 \\ 4x = 8 \\ x = 8 \div 4 \\ x = 2$

$d)9x + 2 = 6 x - 4 \\ 9x - 6x = 4 - 2 \\ 3x = 2 \\ x = 3 \div 2 \\ x = 1.5$

$e)8x + 1 = 6x + 9 \\ 8x - 6x = 9 - 1 \\ 2x = 8 \\ x = 8 \div 2 \\ x = 4$

ATT:MIRANDA ;)