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Please help. This is a solve for x problem!

Please help. This is a solve for x problem!-example-1
User Kieren
by
8.0k points

2 Answers

2 votes

Answer:

x = 3/10 = 0.3

Explanation:

{(2.1)/(x+1 4/5)} = 3/10x

x + 1 4/5 = x + 5/5 + 4/5 = x + 9/5

then:

(2.1)/(x+9/5) = 3/10x

10x*2.1 = 3(x+9/5)

21x = 3x+ 27/5

21x - 3x = 27/5

18x = 27/5

90x/5 = 27/5

90x = 27

x = 27/90

x = 3/10 = 0.3

User Yu Deng
by
7.7k points
2 votes

Answer:

3/10 = x or 0.3 = x

Explanation:

2.1 / x + 1 4/5 = 3 / 10x

1. first cross multiply and solve it normally:

3 (x + 1 4/5) = (2.1) 10x

3x + 5 2/5 = 21x

-3x -3x

5 2/5 = 18x

3/10 = x or 0.3 = x

these questions are kind annoying to solve because of the fractions, so if you can, use a calculator to solve them! its much easier!

hope this helps!

User Lorenzo Marcon
by
8.3k points

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