reonajadehowell24 reonajadehowell24

19-09-2018
Mathematics

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On an algebra test ,the highest grade was 42 points higher than the lowest grade. The sum of the two grades was 138 find the lowest grade

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valex20 valex20

19-09-2018

[tex]lowest = x \\ highest = x + 42[/tex]
[tex]2x + 42 = 138[/tex]
[tex]138 - 42[/tex]
[tex]2x = 96[/tex]
[tex]2x \div 2x \\ 96 \div 2[/tex]
[tex]x = 48[/tex]
[tex]48 + 42 = 90[/tex]
the lowest grade is 48, while the highest is 90.

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