SOLUTION: 2.8-3x=20 what is x?
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Algebra: Expressions involving variables, substitution
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Question 219154
:
2.8-3x=20 what is x?
Answer by
checkley77(12569)
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2.8-3x=20
-3x=20-2.8
-3x=17.2
x=17.2/-3
x=-17.2/3 ans.
Proof:
2.8-3*-17.2/3=20
2.8+17.2=20
20=20