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Boris1002
28.06.2019 •
Mathematics
X-3y=1 and 7x+2y=7 he decided to solve for y in the second equation because it had the smallest number as a coefficient. max told him that there was a more efficient way. what reason can max give for his statement?
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Ответ:
I would solve for x in the first equation. X in the first equation has a coefficient of 1, unlike y in the second equation which has a coefficient of 2. I do not have to divide to solve for my variable.
Step-by-step explanation:
I would solve for x in the first equation. X in the first equation has a coefficient of 1, unlike y in the second equation which has a coefficient of 2.
x-3y =1
Add 3y to each side
x = 1+3y
Then substitute this into the second equation.
Max would have to subtract 7x from each side and then divide by 2
7x+2y =7
2y = -7x+7
y = -7x/2 + 7/2
This makes the math complicated when it is substituted into the first equation because we are multiplying by 3. We will have fractions.
Ответ:
That is the answers.
Step-by-step explanation: