algebra
posted by noonie .
what is 2x+3y=5,3x+5y=9 in substitution form

solve the first equation for x
2x = 3y  5
x = (3 y/2 +5/2)
substitute in the second
3(3y/2+5/2) +5y = 9
9y/2 15/2 + 10y/2 = 18/2
y = 3
then x = 9y/2 5/2 = 2
check by using that x and y in equation 1
2x+3y=5
2*2 + 3*3 = 5?
49 = 5
Yes, checks
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