Question

Х=2у-3 3х+4у=1 Решите систему уравнений методом подстановки.

Answer 1

x= 2y-3

3(2y-3)+4y=1             x=2* 1-3

6y-9+4y=1                  x=-1

10y=10

y=1

Answer 2

х=2у-3

3х+4у=1

1)3(2у-3)+4у=1

6у-9+4у=1

10у=10

у=1

2) х=2у-3

х=2*1-3

х=-1

 

Вот и все:)

Answer 3

Solving the System of Equations by Substitution

To solve the system of equations x=2y-3 and 3x+4y=1 using the method of substitution, we can solve one equation for one variable and then substitute that expression into the other equation.

First, let's solve the first equation for x: x=2y-3.

Now, we can substitute the expression for x into the second equation: 3(2y-3) + 4y = 1.

Solving for y will give us the value of y, and then we can find the value of x using the expression we found for x in terms of y.

Let's proceed with solving for y.