Question

resolva  as equaçoes :

a) x/3 +x/2 =15

b) x-1)/4-(x-3)/6=3

Answer 1

a)
$\frac{x}{3}+\frac{x}{2}=15 \\ \\ 2x+3x=90 \\ \\ 5x=90 \\ \\ x=\frac{90}{5}=18$

b)
$\frac{x-1}{4}-\frac{x-3}{6}=3 \\ \\ 3(x-1)-2(x-3)=36 \\ \\ 3x-3-2x+6=36 \\ \\ 3x-2x=36+3-6 \\ \\ x=33$

Answer 2

x  +  x = 15
3      2  m.m.c


2x+3x=15
   6

2x+3x=6.15
5x=90
x=90/5
x=18



B)
x-1 - x-3=3
 4      6


3(x-1)-2(x-3)=12.3

3x-3-2x+6=36
3x-2x=36+3-6
1x=33
x=33/1
x=33


Espero te ajudado