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3 years ago

-x/8-11=12 / means fraction

Mathematics

2 answers:

Vlad1618 [11]3 years ago

6 0

Answer:

Step-by-step explanation:

-x/8=12+11=23

-x=23*8=184

x=-184

PSYCHO15rus [73]3 years ago

5 0

x=-184Answer:

Step-by-step explanation:

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2 years ago

The sum of the masses of two heavyweight boxers is 190kg. ⅘ the heavier boxer is 10kg less than the mass of lighter boxer. Find

ratelena [41]

Answer:

<em>Their masses are 100 kg and 90 kg</em>

Step-by-step explanation:

<u>Equations</u>

We'll solve the problem by setting only one variable. Let's call:

x = weight of the heavier boxer

Since the sum of the masses of both boxers is 190 Kg:

190 - x = mass of the lighter boxer.

It's given that $\frac{4}{5}$ of the mass of the heavier boxer is 10 kg less than the mass of the other, thus:

$\displaystyle \frac{4}{5}x=190-x-10$

Operating:

$\displaystyle \frac{4}{5}x=180-x$

Multiplying by 5:

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$\displaystyle 4x=5*180-5x$

Simplifying:

$\displaystyle 9x=900$

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The heavier boxer's mass is 100 kg. The lighter boxer has a mass of 190-100 = 90 kg.

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3 years ago