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01. Resolva:
a) 2x-3=5
b) 5.(2-x)+7=0
c) 7y+5-y+8=31
d) 6.(4x+2)+7.(-5x+3)=66
e)16x+2.(7x+)-9=67
01. Resolva:
a) 2x-3=5
b) 5.(2-x)+7=0
c) 7y+5-y+8=31
d) 6.(4x+2)+7.(-5x+3)=66
e)16x+2.(7x+)-9=67
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2x=5+3
2x=8
x=4
b)5.(2-x)+7=0
10-5x+7=0
17-5x=0
-5x=-17
x= 17/5
c)7y+5-y+8=31
6y+5+8=31
6y+13=31
6y=31-13
6y=18
y=3
d)6.(4x+2)+7.(-5x+3)=66
24x+12+7.(-5x+3)=66
24x+12-35x+21=66
-11x+12+21=66
-11x+33=66
-11x=66-33
-11x=33
x=-3