Question

1)4x+18=30
2)3x+6=15
3)20x-4=5x
COM CONTA

Answer 1

1) 4x + 18 = 30
4x = 30-18
x= 12/4
x= 3 

2) 3x + 6 = 15
3x = 15-6
x = 9/3
x = 3

3) 20x - 4 = 5x
20x - 5x = 4
15x = 4 
x = 4/15