Question

5(x+y)=7+4x 4(х+у)=4-у

Answer 1

Ответ:х+5у=7      4х+5у=4

(Но это не точно)

Пошаговое объяснение:

1) 5(х+у)=7+4х

   5х+5у=7+4х

   5х-4х+5у=7

    х+5у=7

(но это не точно)

2) 4(х+у)=4-у

   4х+4у=4-у

   4х+(4у+у)=4

   4х+5у=4

Answer 2

Let's solve this system of equations step by step:

1. The first equation is 5(x + y) = 7 + 4x. We can start by distributing the 5 on the left side:

5x + 5y = 7 + 4x

Now, let's isolate the variables on one side of the equation. First, subtract 4x from both sides:

5x - 4x + 5y = 7

x + 5y = 7

2. The second equation is 4(x + y) = 4 - y. Again, distribute the 4 on the left side:

4x + 4y = 4 - y

Now, let's isolate the variables on one side of the equation. Add y to both sides:

4x + 4y + y = 4

4x + 5y = 4

So, you have the two equations:

1. x + 5y = 7
2. 4x + 5y = 4

Now, you can solve this system of equations using either the substitution method or the elimination method. Let's use the elimination method:

Subtract the first equation from the second equation to eliminate y:

(4x + 5y) - (x + 5y) = 4 - 7

3x = -3

Now, divide both sides by 3 to solve for x:

3x/3 = -3/3

x = -1

Now that you have found the value of x, you can substitute it back into either of the original equations to solve for y. Let's use the first equation:

x + 5y = 7

(-1) + 5y = 7

Add 1 to both sides:

5y = 7 + 1

5y = 8

Now, divide both sides by 5 to solve for y:

5y/5 = 8/5

y = 8/5

So, the solution to the system of equations is:

x = -1 y = 8/5