Question

resolva as equações : a) 2(x+1)-(x-1)=0 b) 5(x+1)-3(x+2)=0 c) 13+4(2x-1)=5(x+2) d) 2(x+5)-3(5-x)=10 e) 8(x-1)=8-4(2x-3)

Answer 1

a)2(x + 1) - (x-1) = 0 
2x + 2 - x + 1 = 0
x + 3 = 0
x = -3

b)5(x + 1) - 3(x + 2) = 0
5x + 5 - 3x - 6 = 0
2x - 1 = 0
2x = 1
x = $\frac{1}{2}$ = 0,5

c)13 + 4(2x - 1) = 5(x+2)
13 + 8x - 4 = 5x + 10
8x - 5x = 10 + 4 - 13
3x = 1
x = $\frac{1}{3}$

d)2(x + 5) - 3(5 - x) = 10
2x + 10 - 15 + 3x = 10
5x = 10 - 10 + 15
5x = 15
x = 3

e)8(x - 1) = 8 - 4(2x - 3)
8x - 8 = 8 - 8x + 12
8x + 8x = 8 + 8 + 12
16x = 28
x = $\frac{28}{16}$ = $\frac{7}{4}$

Espero ter ajudado