montasia21 montasia21

25-05-2018
Mathematics

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Solve 7x - 4 = 5x + 15 for x.

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impossiblestargirl impossiblestargirl

25-05-2018

7x-4=5x+15
-5x on both sides
2x-4=15
add four to both sides
2x=19
divide both sides by 2 to isolate x
x=9.5

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