Posted by **rachel** on Tuesday, December 6, 2011 at 7:48pm.

Solve by substitution.

y=.8x+72

20x+32y=48

How do you get y? i got the x part but i can't seem to get the y part.

- algebra 1 -
**bobpursley**, Tuesday, December 6, 2011 at 7:49pm
solve this:

20x+32 (.8x+72)=48

then, you have x. Then solve y=.8x+72

- algebra 1 -
**rachel**, Tuesday, December 6, 2011 at 8:02pm
i actually wrote the second part wrong. Its supposed to be y=.8x+7.2 not 72. and when i solved it i got 10.4 for y and my x is 4.

- algebra 1 -
**rachel**, Tuesday, December 6, 2011 at 8:13pm
Is it right?

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