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OpenStudy (anonymous):
What's the solution for 0.7(x + 90) + 0.1x = 79 ?
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OpenStudy (anonymous):
When I divided 16 by 0.8, I got 20..
OpenStudy (anonymous):
yeah because you paid attention. i divided .8 by 16 :) i need sleep, sorry
OpenStudy (anonymous):
expand 0.7(x + 90) + 0.1x =79 to .7x + 63 +0.1x =79 combine x's .8x = 16 divide both sides by .8: x = 20
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