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43 votes
43 votes
2(1 - 5x) + 4 = -8 whats x equal too?

i need the answer! it keeps saying its 7/5 but the thing keeps saying its wrong!

User Miradulo
by
2.9k points

2 Answers

19 votes
19 votes

Answer: x=7/5=1.4=1²/₅

Explanation:


2(1-5x)+4=-8\\2(1)-2(5x)+4=-8\\2-10x+4=-8\\6-10x=-8\\6-10x+10x=-8+10x\\6=-8+10x\\6+8=-8+10x+8\\14=10x

Divide both parts of the equation by 10:


\displaystyle\\(14)/(10)=x\\\\ (2(7))/(2(5))=x\\\\ (7)/(5)=x\\\\ Thus,\ x=(7)/(5)=1.4=1(2)/(5)

User Kevbonham
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3.2k points
20 votes
20 votes
It is in fact 7/5 but for decimal form it’s 1.4 and mixed number would be 1 2/5. If you can’t find your answer, I apologize.
User Jgosar
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3.1k points