Question

RESOLVA AS SEGUINTES EQUAÇÕES DO 1º GRAU.

a) +2. (+ x+3) = - 3.( +x+3)=



b) +5.( +x+1)+6.( +x+2)= +3.( +x+3)=



c) +4.( +3x-1) -2.( +4x+6) =+4



d) +3. ( +2x+7) +2x - 11= +16



e) +4x -10 = +2x+2=

Answer 1

Resposta: a) -3     b) -1      c) +5         d) 3/4

Explicação passo-a-passo:

a) + 2. ( +x + 3) = - 3. ( + x + 3)

2x + 6 = -3x - 9

2x + 3x = - 9 - 6

5x = - 15

x = - 15 : 5

x = - 3

b) +5. ( + x + 1 ) + 6. ( + x + 2 ) = + 3. ( + x + 3 )

+ 5x + 5 + 6x + 12 = 3x + 9

5x + 6x - 3x = + 9 - 5 - 12

8x =  -8

x= 8: (-8) =

x= -1

c) +4. ( + 3x - 1 ) - 2. ( + 4x + 6) = +4

+12x - 4 -8x - 12 = + 4

+ 12x - 8x = + 4 + 4 + 12

+ 4x = + 20

x = 20 : 4

x = 5

d) +3. (+2x + 7) + 2x - 11 = + 16

+ 6x + 21 + 2x - 11 = + 16

+6x + 2x = + 16 - 21 + 11

8x = 6

x= 6/8

x= 3/4