2 years ago

Guys i need an answer and explain

Mathematics

1 answer:

Stella [2.4K]2 years ago

8 0

Step-by-step explanation:

2 x 2= 4, no. of 2s= 2

2 x 2 x 2= 8, no. of 2s= 3

2 x 2 x 2 x 2= 16, no. of 2s= 4

2 x 2 x 2 x 2 x 2= 32, no. of 2s= 5

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AFLATI 2 NUMERE STIIND CA AL DOILEA NUMAR ESTE DE 7 ORI MAI MARE DECITPRIMUL IAR SUMA DINTRE DUBLUL PRIMULUI NUMAR SI TRIPLUL CE

postnew [5]

Answer:

The numbers are 20 and 140

Step-by-step explanation:

The question in English is

Find 2 numbers knowing that the second number is 7 times greater than the first, and the sum between the double of the first number and the triple of the second is 460

Define the variables

Let

x ----> the first number

y ----> the second number

we know that

$y=7x$ -----> equation A

$2x+3y=460$ ----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B

$2x+3(7x)=460$

solve for x

$2x+21x=460$

$23x=460$

$x=20$

Find the value of y

$y=7x$ ----> $y=7(20)=140$

The numbers are 20 and 140

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