Pergunta

solve using elimination. -3x+y=-12 9x-9y=-18 d square D
Solução

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AlexandreMestre · Tutor por 5 anos
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To solve the system of equations using elimination, we can follow these steps:
1. Multiply the first equation by 3 to make the coefficients of y in both equations equal:
2. Add the two equations together to eliminate y:
3. Divide both sides of the equation by -6 to solve for y:
4. Substitute the value of y into one of the original equations to solve for x. Let's use the first equation:
Therefore, the solution to the system of equations is
1. Multiply the first equation by 3 to make the coefficients of y in both equations equal:
2. Add the two equations together to eliminate y:
3. Divide both sides of the equation by -6 to solve for y:
4. Substitute the value of y into one of the original equations to solve for x. Let's use the first equation:
Therefore, the solution to the system of equations is
and
.
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