Pergunta

What is the solution to the system of equations? ) -2x+3y=13 3x+4y=6 (-2,3) C (-(7)/(2),2) (3,-2) (-11,3)
Solução

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VascoElite · Tutor por 8 anos
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To solve the system of equations, we can use the method of substitution or elimination. Let's use the elimination method.
First, we can multiply the first equation by 3 and the second equation by 2 to make the coefficients of x in both equations equal:
\begin{cases} -6x + 9y = 39\\ 6x + 8y = 12\end{cases}
Next, we can add the two equations together to eliminate x:
-6x + 9y + 6x + 8y = 39 + 12
17y = 51
Dividing both sides by 17, we get:
y = 3
Now that we have the value of y, we can substitute it back into one of the original equations to solve for x. Let's use the first equation:
-2x + 3(3) = 13
-2x + 9 = 13
Subtracting 9 from both sides, we get:
-2x = 4
Dividing both sides by -2, we get:
x = -2
Therefore, the solution to the system of equations is (-2, 3)
First, we can multiply the first equation by 3 and the second equation by 2 to make the coefficients of x in both equations equal:
\begin{cases} -6x + 9y = 39\\ 6x + 8y = 12\end{cases}
Next, we can add the two equations together to eliminate x:
-6x + 9y + 6x + 8y = 39 + 12
17y = 51
Dividing both sides by 17, we get:
y = 3
Now that we have the value of y, we can substitute it back into one of the original equations to solve for x. Let's use the first equation:
-2x + 3(3) = 13
-2x + 9 = 13
Subtracting 9 from both sides, we get:
-2x = 4
Dividing both sides by -2, we get:
x = -2
Therefore, the solution to the system of equations is (-2, 3)
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