Question

RESOLVER AS ATIVIDADES DAS EQUAÇÕES COM PARÊNTESES:
3(x + 1) + 2(2x – 3) = 5 (x – 1 ) + 8

2(2x + 7 ) + 3(3x – 5 ) = 3(4x – 5 ) – 1

4(2m-1) + 3m = 2(4m-1) – (2 –m)

Answer 1

Resposta:

a)x=3

b)x=-15

c)m=-1

Explicação passo a passo:

a)3(x + 1) + 2(2x – 3) = 5 (x – 1 ) + 8

3x+3 +4x-6 = 5x-5+8

7x-3=5x+3

7x-5x=+3+3

2x=6

x=3

b)2(2x + 7 ) + 3(3x – 5 ) = 3(4x – 5 ) – 1

4x+14+9x-15=12x-15-1

13x-1=12x-16

13x-12x=-16+1

x=-15

c)4(2m-1) + 3m = 2(4m-1) – (2 –m)

8m-2+3m=8m-2-2+m

11m-2=9m-4

11m-9m=2-4

2m=-2

m=-2/2

m=-1