Question

Three seventh of a number is 12 more
than 40% of that number. What will be
the 60% of that number?​

Answer 1

Answer:

please mark me brainiest

Let the number be x

Three seventh of the number is (3/7)x

=3x/7

40 % of the number is (x/100)×40

=4x/10=2x/5

12 more than 40 % of the number =(2x/5)+12

=(2x+60)/5

Three seventh of a number is equal to 12 more than 40 % of that number.

(3x/7)=[(2x+60)/5]

5(3x)=7(2x+60)

15x=14x+420

x=420

ok thanks

Answer 2

Answer:

the number is 420

Step-by-step explanation:

Let the number be x.

We need to find:

$\dfrac{60}{100}x$

From the question, we can write:

$\dfrac{3}{7}x=12+\dfrac{40}{100}x$

Subtracting x from both sides:

$\dfrac{3}{7}x-x=12+\dfrac{40}{100}x-x\\\\\dfrac{60}{100}x=12+\dfrac{4}{7}x$

This means 60% of that number is 12 more than four seventh of the number

Solving this:

$\dfrac{60}{100}x-\dfrac{4}{7}x=12\\\\\dfrac{20}{700}x=12\\\\x=420$