Question

1- Resolva as equações a seguir:

a) 10x+ 1 = x+2
b) 2x+1 = -25x-1
c) 5x+1 = 1-x
d) x-1 = 1-x

Answer 1

a) 10x + 1 = x + 2

10x - x = 2 - 1
9x = 1
x = 1/9
.
.
b) 2x + 1 = -25x - 1

2x + 25x = -1 - 1
27x = -2
x = -2/27
.
.
c) 5x + 1 = 1 - x

5x + x = 1 - 1
6x = 0
x = 0/6
x = 0
.
.
d) x - 1 = 1 - x

x + x = 1 + 1
2x = 2
x = 2/2
x = 1

Answer 2

a)
10x+1= x+2
10x-x= 2-1
9x= 1
x= 1/9
_________________________________________
b)
2x+1= -25x-1
2x+25x= -1-1
27x= -2
x= -2/27
_________________________________________
c)
5x+1= 1-x
5x+x= 1-1
6x= 0
x= 0/6
x= 0
__________________________________________
d)
x-1= 1-x
x+x= 1+1
2x= 2
x= 2/2
x= 1

Forte abraço!