Mathematics: Solve the system by substitution y = x y = 4x - 9

Step-by-step explanation:we know that the angle is less than 90, so there is only one choice for that , the 75° choice. that also seems about right. ...

Solve the system by substitution y = x y = 4x

Ответ:

OkK1510

23.03.2022

Mathematics

The solution to the system of equations will be:

$y=3,\:x=3$

Step-by-step explanation:

Given the system of equations

y = x

y = 4x - 9

solving the system of equations by the substitution method

$\begin{bmatrix}y=x\\ y=4x-9\end{bmatrix}$

substitute y = 4x - 9

$\begin{bmatrix}4x-9=x\end{bmatrix}$

now isolate x for 4x-9 = x

4x-9=x

Add 9 to both sides

4x-9+9=x+9

Simplify

4x=x+9

Subtract x from both sides

4x-x=x+9-x

Simplify

3x=9

Divide both sides by 3

$\frac{3x}{3}=\frac{9}{3}$

Simplify

x=3

For y=4x-9 substituute x = 3

$y=4\cdot \:3-9$

Simplify

y=3

Therefore, the solution to the system of equations will be:

$y=3,\:x=3$

0,0(0 оценок)

Solve the system by substitution

y = x
y = 4x - 9

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Mathematics

Ask an AI advisor a question