Question

3X + 1/2 = 5

4x/3 + 2 X = -2 (x - 20)

Answer 1

3 X + 1/2 = 5
M.M.C = 2
6 X/2 + 1/2 = 10/2 eliminar o denominador
6 x + 1= 10
6 x = 10 - 1
6 x = 9
x = 9/6 simplifica por 3 = 3/2

4 x/3 + 2 x = - 2 (x - 20) 
4 x/3 + 2 x = -2 x + 40
m.m.c = 3
4 x/3 + 6 x/3 = -6 x/3 + 120/3 eliminar o denominador
4 x + 6 x = - 6 x + 120
10 x = - 6 x + 120
10 x + 6 x = 120
16 x = 120
x = 120/16  simplifica por 8
x = 15/2