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1. so he lost 10 points, seven times. how many points has he lost in this part of the question alone? @bre464
yes i guess
so how many points have already been lost, if he loses 10,seven times?
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Ok so lets assume he started out with x points.... he lost 10 points seven times means his score x loses 7*10 points... therefore x-70 is his new score... then he losses an additional 100 points which means (x-70)-100 or x-170... therefore the change in his score is the difference between his old and new score x-(x-170)=170
Now you don't have to algebra up the problem you can simply compute that number, but it might help on problems like these if you are confused as a placeholder while you work out the logic
tbh this is 7th grade math question here didn't you know that already