Question

Resolva as seguintes equações:
a) 3x/2 = 1/5
b) x+3/2 + x+2/3 = 13

Answer 1

A)  = 3x/2 = 1/5
multiplica cruzado, logo
5(3x) = 2(1)
15x = 2 
x = 2/15 

B) (x+3)/2+(x+2)/3 = 13
(x+3) = 13-(x+2)/3
(x+3) = (39-x+2)/3
Multiplica cruzado
3(x+3) = (39-x+2)
3x+9 = 39-x+2
3x+x+9-2-39
4x+7-39
4x-32
4x = 32
x = 32/4
x = 8