resolva as equações por favor!!!
a) 18x - 43=65
b) 23x-16=14-17x
c) 10y-5(1+y)=3(2y-2)-20
a) 18x - 43=65
b) 23x-16=14-17x
c) 10y-5(1+y)=3(2y-2)-20
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18x=65+43
18x=108
x=6 S={6}
b)23x-16=14-17x
23x+17x=14+16
40x=30
x=3/4 S={3/4}
c)10y-5(1+y)=3(2y-2)-20
10y-5-5y=6y-6-20
5y-6y=-26+5
-y=-25
- com - dá mais,ou seja,
y=25 S={25}
vlw