Question

resolva as equaçoes:a)7y+5-y+8=31b)5.(3-2a)=55c)27=3.(x+3)d)16x+2.(7x+8)-9=67e)6.4z+2)+7.(-5z+3)=66f)12+3x+6).(-7)-5=70

Answer 1

a)7y+5-y+8=31  ==>6y=26 ==>y=13/3

b)5.(3-2a)=55  ==>15-10a=55 ==>a=-40/10=-4

c)27=3.(x+3) ==>27=3x+9 ==>x=18/3=6

d)16x+2.(7x+8)-9=67 ==>16x+14x+16-9=67 ==>x=60/30=2

e)6.4z+2)+7.(-5z+3)=66 ==>tem problema  no parêntesis 

f)12+3x+6).(-7)-5=70 tem problema no parêntesis 

Answer 2

a) 6y = 18 >>>> y = 18/3 >>>> y = 6

b) 15 - 10a = 55 >>>>  a = 40/ 10 >>>> a = 4

c) 27 = 3x + 9 >>> 18/ -3 =  x  >>> -6 = x

d) 30x+ 7 = 67 >>>> x = 60/30>>>> x = 2

e) 24z + 12 -35z+21 = 66 >>> -11z+33 = 66 >>> z= 33/11 >>> z = 3

f)12+3x-35-30 = 70 >>> 3x = 123>>> x = 123/3 >>> x = 41