Solve for x and y:
3/x=2/5
y/4=y-1/3

Question

Solve for x and y: 
3/x=2/5
y/4=y-1/3

anonymous · Answer

solve for x on top one 

then plug it into  bottom one.

anonymous · Answer

Or you can use matrices. Set up augmented matrix and reduce to echelon form.

anonymous · Answer

yea...how do u do that? lol

asnaseer · Answer

top equation is:$$\frac{3}{x}=\frac{2}{5}$$just cross multiply to find x.

asnaseer · Answer

is the bottom equation this?$$\frac{y}{4}=y-\frac{1}{3}$$

anonymous · Answer

no its y-1 on top and 3 on bottom

asnaseer · Answer

so botton equation is:$$\frac{y}{4}=\frac{y-1}{3}$$again, just cross multiply and solve to find y

asnaseer · Answer

by cross multiply I mean this:

lets say you were given:$$\frac{a}{b}=\frac{c}{d}$$then you can say:$$a\times d=c\times b$$

anonymous · Answer

so for x it would be 15 over 2 which equals 7.5?

asnaseer · Answer

It's called cross multiplication because of this diagram:
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