Question

calcule o valor de x: 
a) 5 ( x+ 1) =10

b) 2 x -3 = 3x -1

c) 2 x -3=6

Answer 1

Olá,
  

$a)5.(x+1)=10$
$5x+5=10$
$5x=10-5$
$5x=5$
$x= \frac{5}{5}$
$x=1$


$b)2x-3=3x-1$
$2x-3x=-1+3$
$(-x=+2).(-1)$
$x=-2$

$c)2x-3=6$
$2x=6+3$
$2x=9$
$x= \frac{9}{2}$
$x=4,5$

ESPERO TER AJUDADO!! :D

Answer 2

a) 5 (x+ 1) =10
5x + 5 = 10
5x = 10 - 5
5x = 5
x = 5 ÷ 5
x = 1

b) 2x - 3 = 3x - 1
2x - 3x = - 1 + 3
- x = - 1 + 3
- x = 2
x = - 2

c) 2x - 3 = 6
2x = 6 + 3
2x = 9
x = 9 ÷ 2
x = 4,5   ou 9/2