Question

X37. Resolva as equações.
a) 7(x - 2) = 5(x + 3)
b) 2(x - 5) + 4(x - 1) = 0
c) 3(2x - 1) = -2(x+3)
d) 7(x - 1) - 2(x - 5) = x - 5​

Answer 1

a) 7x-14=5x+15

7x-5x=15-14

2x=1

x=1/2

x=0,5

b) 2x-10+4x-1=0

2x+4x=10+1

6x=11

x=11/6

c) 6x-3=-2x-6

6x+2x=-6+3

8x=-3

x=-3/8

d) 7x-7-2x-10=x-5

7x-2x-x=-5+7+10

4x=12

x=12/4

x=3

Answer 2

Resposta:

a) 7(x-2)=5(x+3)

7x+14=5x+15

7x-5x=15-14

2x=1

x=1/2

b) 2(x--5) +4(x-1)=0

2x-10+4x-4=0

2x+4x=10+4

6x=14

x=14:2/6:2

x=7/3

c)3(2x-1)=-2(x+3)

6x-3=-2x-6

6x+2x=-6+3

8x=-3

x=-3/8

d)7(x-1)-2(x-5)=x-5

7x-7-2x+10=x-5

7x-2x-x=-5+7-10

4x=-8

x=-8/4

x=-2