Question

resolva as equaçoes 
a) 2x+6=16

b)5x-7=12

c)x+6x-9x-10=130

Answer 1

a) 2x+6=16
2x=16-6
2x=10
x=5

b) 5x-7=12
5x=12+7
5x=19
x=19/5

c)x+6x-9x-10=130
-2x=130+10
-2x=140
-x=70
x=-70