Question

1) Resolva as seguintes equações:

a) -2 (2X+3)+5=10-X
b) 5 (X-2)=4 (3X+X)
c) 3 (3X-2)-4 = 5-X
d) 4 (X+5) = 3 (2X-2)​

Answer 1

Resposta:

Olá

Explicação passo-a-passo:

a)

$- 2(2x + 3) + 5 = 10 - x \\ - 4x - 6 + 5 = 10 - x \\ - 3x = 11 \\ x = - \frac {11}{3}$

$3(3x - 2) - 4 = 5 - x \\ 9x - 6 - 4 = 5 - x \\ 10x = 5 + 6 + 4 \\ 10x = 15 \\ x = \frac{15}{10}$

d)

$4(x + 5) = - 3(2x - 2) \\ 4x + 5x = - 6x + 6 \\ 15x = 6 \\ x = \frac{6}{15}$

b)

$5(x - 2) = 4(3x + x) \\ 5x - 10 = 12x + 4x \\ 5x - 12x - 4x = 10 \\ - 11x = 10 \\ x = - \frac{10}{11}$

Answer 2

Explicação passo-a-passo:

-2 (2X+3)+5=10-X

-4x-6+5=10-x

-4x-1=10-x

-4x+x=10+1

-3x=11

x=-11/3

5 (X-2)=4 (3X+X)

5x-10=12x+4x

5x-12x-4x=10

-11x=10

x=-10/11

3 (3X-2)-4 = 5-X

9x-6-4=5-x

9x-10=5-x

9x+x=5+10

10x=15

x=15/10(÷5)

x=3/2

4 (X+5) = 3 (2X-2)

4x+20=6x-6

4x-6x=-6-20

-2x=-26(-1)

2x=26

x=26/2

x=13