Question

4(-2x+5)+3y-2x x=-1 2/5,y= 2 1/3

Answer 1

Ответ:

(3(2x+y)-2(2x-y))/(4x²-y²) * (4x²-y²)/(2x-5y)=(6x+3y-4x+2y)/(2x-5y)=(2x+5y)/(2x-5y)

Пошаговое объяснение:

Answer 2

To evaluate the expression 4(-2x+5) + 3y - 2x when x = -1 2/5 and y = 2 1/3, follow these steps:

1. Replace x with its value (-1 2/5) and y with its value (2 1/3) in the expression:

4(-2(-1 2/5) + 5) + 3(2 1/3) - 2(-1 2/5)

2. Now, simplify each part of the expression step by step:

First, let's deal with -2(-1 2/5):

-2(-1 2/5) = -2*(-7/5) = 14/5

So, the expression becomes:

4(14/5 + 5) + 3(2 1/3) - 2(-1 2/5)

Now, simplify further:

4(14/5 + 5) = 4(14/5 + 25/5) = 4(39/5)

3(2 1/3) = 3(7/3 + 2) = 3(9/3)

-2(-1 2/5) = -2*(-7/5) = 14/5

Now, let's continue simplifying:

4(39/5) = (4/5) * 39 = 156/5

3(9/3) = (3/1) * (9/3) = 27/1 = 27

-2(14/5) = -28/5

Now, add all these simplified parts together:

(156/5) + 27 - (28/5)

Now, find a common denominator, which is 5:

(156/5) + (5*27/5) - (28/5)

Now, add the fractions:

(156 + 135 - 28) / 5 = (263 - 28) / 5 = 235/5 = 47

So, the value of the expression 4(-2x+5) + 3y - 2x when x = -1 2/5 and y = 2 1/3 is 47.