Question

resolva as equações : a)2x-1=x+5 b)x+5=7-2x c)18x-45=65 d)23x-16=14-17x e)10x-5-5x=6x-26 f)5x-7=10+x g)10x+16-14x+8 h)20x-12=96 i)6x+4x-3x=84

Answer 1

a) 2x - 1 = x + 5

2x - x = 5 + 1
x = 6
.
.
b) x + 5 = 7 - 2x

x + 2x = 7 - 5
3x = 2
x = 2/3
.
.
c) 18x - 45 = 65

18x = 65 - 45
18x = 20
x = 20/18
x = 10/9
.
.
d) 23x - 16 = 14 - 17x

23x + 17x = 14 + 16
40x = 30
x = 30/40
x = 3/4
.
.
e) 10x - 5 - 5x = 6x - 26

10x - 5x - 6x = -26 + 5
-x = -21 . (-1)
x = 21
.
.
f) 5x - 7 = 10 + x

5x - x = 10 + 7
4x = 17
x = 17/4
.
.
g) 10x + 16 - 14x + 8

10x - 14x = -16 - 8
-4x = -24
x = -24/-4
x = 6
.
.
h) 20x - 12 = 96

20x = 96 + 12
20x = 108
x = 108/20
x = 27/4
.
.
i) 6x + 4x - 3x = 84

7x = 84
x = 84/7
x = 12



☆Espero ter ajudado!