Question

resolva a equação
a) 7(x-2)=5(x-2)
b) 3(x+10)-2(x-5)=0
c) 2(x-6)=3(5=x)
d) 2(3x-5)-x=10-38

Answer 1

a)

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

7x - 14= 5x - 10

7x - 5x= - 10 + 14

2x= 4

x= 4/2

x= 2

b)

3(x+10) - 2(x-5)= 0

3x + 30 - 2x + 10= 0

3x - 2x= 0 - 30 - 10

1x= - 40

x= -40/ 1

x= -40

c)

2(x-6)= 3(5-x)

2x - 12= 15 - 3x

2x + 3x= 15 + 12

5x= 27

x= 27/ 5

d)

2(3x-5) -x= 10 - 38

2x - 10 - x= 10 - 38

2x - x= - 38 + 10

1x= - 28

x= -28/ 1

x= -28