You can put this solution on YOUR website! x+y+z=45
6x+5.40y+4.5z=252
z=2y
substitute z
x+y+2y=45
x+3y=45
6x+5.4y+9y=252
6x+14.4y=252
1.00 x + 3.00 y = 45.00 .............1
Total value
6.00 x + 14.40 y = 252.00 .............2
Eliminate y
multiply (1)by 14.40
Multiply (2) by -3.00
14.40 x 43.20 y = 648.00
-18.00 x -43.20 y = -756.00
Add the two equations
-3.60 x = -108.00
/ -3.60
x = 30.00
plug value of x in (1)
1.00 x + 3.00 y = 45.00
30.00 + 3.00 y = 45.00
3.00 y = 45.00 -30.00
3.00 y = 15.00
y = 5.00
z=2y
z=10
