need alot of help please math
posted by hannia on .
hello i need help with system of equations theres 3 only thank you
2x+3y17
3x+y=31
2(x3y)=24
y=3x2
2(x+4)=24
x+y=17

2x+3y=17 I assume
3x+y=31
try elimination
multiply the entire first equation by 3 to get 6x term
multiply the entire second equation by 2 to get 6x term
so:
6x+9y = 51
6x+2y = 62
 subtract
7 y = 11
y = 11/7
then 2x = 17+33/7
x = 152/14 = 76/7
check
3(76/7) 11/7 = 31, right 
for the second one you already have y as a function of x so use substitution
2(x3y)=24 > x  3y = 12
y=(3x2 )
x  3(3x2) = 12
8 x + 6 = 12
8 x = 6
x = 3/4 etc 
are you sure whatb grade are you in