3 years ago

Help me please i will give brainliest

Mathematics

2 answers:

Afina-wow [57]3 years ago

8 0

Answer:

Two

Step-by-step explanation:

And these are Elimination and substitution

This type of equation is Simultaneous equation

o-na [289]3 years ago

8 0

There is no solution

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Solve the system of Equation (x,y)<br> - 4x + y = 9<br> x – 3y = -6

Margarita [4]

Answer:

$(-\frac{21}{11},\frac{15}{11})$

Step-by-step explanation:

Given:

$- 4x+y =9\\ x-3y = -6$

Express $y$ in terms $x$ of using the first equation.

$-4x+y=9\\y=4x+9$

Now, plug in the above value in second equation and solve for $x$ .

This gives,

$x-3y = -6\\x-3(4x+9)=-6\\x-12x-27=-6\\-11x-27=-6\\-11x=-6+27\\-11x=21\\x=\frac{21}{-11}=-\frac{21}{11}$

Now, plug in $x$ value and solve for $y$ . This gives,

$y=4x+9=4(-\frac{21}{11})+9=-\frac{84}{11}+\frac{99}{11}=\frac{-84+99}{11}=\frac{15}{11}$

Therefore, the solution is $(-\frac{21}{11},\frac{15}{11})$

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