Algebra 2
posted by
crystine
.
i need help solving the problem
3x+y=1
2x+3y=18
using substitution

Algebra 2 
Ms. Sue
3x+y=1
y = 1 3x
2x+3y=18
2x + 3(13x) = 18
2x  3  9x = 18
7x = 21
x = 3
Substitute 3 for x in the first problem to find the value of y.

Algebra 2 
sukhi
matrix[2x,0
4,y]=matrix[4,0
4,1]