Question

resolva as equações:
h)10-6 (z-8)=9+z
i) 12+2n=9(n-7)-2
f)6 (x+5)=x

Answer 1

h) 10-6z+48=9+z
10+48-9=z+6z
49=7z
z=7

i) 12+2n=9n-63-2
2n-9n=-63-2-12
-7n=-77  (x-1)
7n=77
n=11

j)6x+30=x
6x-x=30
5x=30
x=6