Question

resolve as seguintes equações​

Answer 1

2a=12-------a=12/2-----a=6

4u=16------u=16/4------u=4

12a-3=a+6------12a-a=6+3---------11a=9------a=9/11----a=0.81

x+6=2x-12--------x-2x=-12-6------. -x=-18(-1)------X=18