Question

Calcule as equações:

a) 6y + 4.(y – 4) = 4.(y – 2) – 20

b) 2.(3 – x) = 3.(x – 4) + 15

c) 3x – 2.(4x – 3) = 2 – 3.(x – 1)

d) 10x – 5.(1 + x) = 3.(2x – 2) – 40

e) 5.(x + 3) – 2.(x – 1) = 20

Answer 1

Resposta:

A- 6y+(4y−16)−{(4y−8)−20}=0

(10y−16)−{4y−28}=0

6y+12=0

(6)⋅y+(12)=0

y=−(12)6

y=−(6)⋅(2)(6)=−2

B- 2⋅(−x+3)−{(3x−12)+15}=0  

(−2x+6)−{3x+3}=0

−5x+3=0

(−5)⋅x+(3)=0

x=−(3)−5

x=35

C- 3x−(8x−6)−{2−(3x−3)}=0

(−5x+6)−{−3x+5}=0

−2x+1=0

(−2)⋅x+(1)=0

x=−(1)−2

x=12

D- 10x−5⋅(x+1)−{3⋅(2x−2)−40}=0  

10x−(5x+5)−{(6x−6)−40}=0

(5x−5)−{6x−46}=0

−x+41=0

(−1)⋅x+(41)=0

x=−(41)−1

x=41

E- (5x+15)−(2x−2)−{20}=0

(3x+17)−{20}=0

3x−3=0

(3)⋅x+(−3)=0

x=−(−3)3

x=−(3)⋅(−1)(3)=1

Eu usei o site minimath para solucionar de uma olhada é só copiar a equação que resolve automática