Question

Х+у=10х+4у=-5Способом подстановки

Answer 1

............ Вроде так

Answer 2

To solve the system of equations using the method of substitution, we need to solve one of the equations for one of the variables and then substitute that expression into the other equation. Let's solve the first equation for one of the variables:

Equation 1: x + y = 10

Solving for y: y = 10 - x

Now, substitute this value of y into the second equation:

Equation 2: 10x + 4y = -5

Replace y with (10 - x):

10x + 4(10 - x) = -5

Now, simplify the equation:

10x + 40 - 4x = -5

Combine like terms:

6x + 40 = -5

Now, isolate x by moving the constant term to the other side:

6x = -5 - 40 6x = -45

Finally, solve for x:

x = -45 / 6 x = -7.5

Now that we have the value of x, we can find the value of y using the first equation:

x + y = 10 -7.5 + y = 10

Now, solve for y:

y = 10 + 7.5 y = 17.5

So, the solution to the system of equations is x = -7.5 and y = 17.5.