Solve the system by using substitution 4y = x 3x - y = 70 a) (2 2/3, 1 1/3) b) (25 5/11, 6 4/11) c) (35, 8 3/4) d) (6 4/11, 25 5/11) and

Option B is the answer of the required system

Step-by-step explanation:

As given to us that

4y = x let it be equation (i)

and

3x - y = 70 let it be equation (ii)

Now from equation (i) we see that

x = 4y                    .................(iii)

Putting this value in equation (ii)

We will get

3(4y)-y=70

12y - y = 70

11 y = 70

or

y =                   ...................(iv)

Putting this in equation (iii)

Now it becomes

x = 4*

or

x=  

AS the answer given to us are in mixed fractions so we will do the division of it

First for y

y =        

Actually in the division we calculate the table of Divisor which is 11 to get a remainder and an answer

Now when we will calculate the table of 11 we see that

11 * 6 = 66

and 11 * 7 = 77

As 70 is smaller then 77 so  

When we will do the division of 70 with 11    

Quotient is 6 Remainder is 4 and divisor is 11

And it can be written in the form of Mixed fraction as

Answer  = Quotient *

So

y = 6*

Now similarly for value of x

When we will do the division of 280 with 11    

Quotient is 25 Remainder is 5 and divisor is 11

And it can be written in the form of Mixed fraction as

x = 25*

So Answer will be option B

answer: 0.64

step-by-step explanation: