Question

4- Resolva as equações
$a ) \times + 5 = 8 \\ b)\times - 3 = 7 \\ c)2 \times = 10 \\ \frac{ d )\times }{6} = 6$
me ajuda por favor
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Answer 1

Resposta:

a)4x-1=3(x-1)

4x-1=3x-3

4x-3x=-3+1

x=-2

b)3(x - 2) = 2x - 4

3x-6=2x-4

3x-2x=-4+6

x=2

c)2(a - 1) = 3a + 4

2a-2=3a+4

3a-2a=-2-4

a=-6

d) 3(c-1)- 7 = 15

3c-3-7=15

3c-10=15

3c=25

c=25/3

e) 7(b - 4) = 2b - 3

7b-28=2b-3

7b-2b=-3+28

5b=25

b=5

f) 3(x - 2) = 4(3 - x)

3x-6=12-4x

3x+4x=12+6

7x=18

x=18/7

g) 3 (3k - 1) = -2 (3k + 2)

9k-3=-6k-4

9k+6k=-4+3

15k=1

k=1/15

h) 7 (w - 2) = 5 (w + 3)

7w-14=5w+15

7w-5w=15+14

2w=29

w=29/2

i) 3 (2h - 1) = -2 (h+ 3)

6h-3=-2h-6

6h+2h=-6+3

8h=-3

h=-3/8

j) 5(1 - x) - 2x + 1 = -3(2 + x)​

5-5x-2x+1=-6-3x

-7x+3x=-6-1-5

(-1)-4x=-12(-1)

4x=12

x=12/4=3

Explicação passo-a-passo:espero ter ajudado!!