9th grade
posted by helpme!!!!!!!!! on .
solve and comparison:
a)4x9y+4
6x+15y=13
im so lost!!!!!

srry
it's
solve and comparison:
a)4x9y=4
6x+15y=13
im so lost!!!!! 
Help me is NOT the name of this post. Math or Algebra.
Sra 
4x9y=4
6x+15y=13
To solve, first isolate x (or y) in one of the equations.
4x = 4 + 9y
x = 1 + 2.25y
Substitute the right hand portion for x in the second equation.
6(1 + 2.25y) + 15y = 13
Solve for y. Put that value into the first equation to solve for x. To check, put both values into the second equation.
I hope this helps. Thanks for asking.