Question

stiind ca...a) x+2y+13=24,determinati18+2y+x
b)3x+6y+19=43,determinati 6y+38+3x
c) 2x+2y+38=62,determinati4y+27+4x
d)5x+18+20y=43,determinati15x+38+60y
e)3x+2y+4z=30,determinati 4z+43+2y+27
f)x+3+y+4+z+5=12,detrminati 2012+x+y+z
repede va rog este urgent

Answer 1

a) x+2y+13=24,determinati18+2y+x
x+2y+13+5=24+5
x+2y+18=29
18+2y+x =29

b)3x+6y+19=43,determinati 6y+38+3x
3x+6y+19+19=43+19
3x+6y+38=62
6y+38+3x=62

 c) 2x+2y+38=62,determinati4y+27+4x
2x+2y+38-11=62-11
2x+2y+27=51


d)5x+18+20y=43,determinati15x+38+60y
5x+18+20y=43    inmultim cu 3
15x+54+60y=129
15x+54-16+60y=129-16
15x+38+60y=113


 e)3x+2y+4z=30,determinati 4z+43+2y+27
3x+2y+4z=30
2y+4z =30-3x
2y+4z+43+27 =30-3x+43+27
4z+43+2y+27 =100
4z+2y+70 =100

f) x+3+y+4+z+5=12,determinati 2012+x+y+z
x+y+z+12=12
x+y+z=0
2012+x+y+z=2012