Question

Даю 40 балов розв'яжіть систему рівнянь x+y=1 2y+7x=20 розвяжіть трьома способами (графічеий,підстановка,додавання) Даю 40 баллов решите систему уравнений x+y=1 2y+7x=20 решите тремя способами (графический,подстановка,сложение)

Answer 1

Графический способ я делала без линейки,так что вышло не точно,но,думаю,у тебя линейка будет...так что..Да...Вообщем...

Надеюсь помогла.Удачи>

Answer 2

Solving the System of Equations

To solve the system of equations x + y = 1 and 2y + 7x = 20, we can use three different methods: graphical, substitution, and addition. Let's go through each method step by step.

Graphical Method

In the graphical method, we plot the equations on a coordinate plane and find the point of intersection, which represents the solution to the system of equations.

To plot the first equation x + y = 1, we can rearrange it to solve for y: y = 1 - x. Now we can create a table of values and plot the points:

| x | y | |---|---| | 0 | 1 | | 1 | 0 | | 2 | -1 |

Plotting these points on a graph, we can draw a straight line passing through them.

Next, let's plot the second equation 2y + 7x = 20. Rearranging it to solve for