MATHEMATICS MIDDLE SCHOOL

Solve this system of equations: 2x+y=11 y=x-1

Please explain how you got it and try to explain your steps!

Answers

Answer 1
Answer: Use the substitution method to solve. 

2x+y=11
y=x-1

We have the value for y, so put it in the first equation.

2x + x - 1 = 11
2x + x = 3x
3x - 1 = 11
      + 1    +1

3x = 12
x = 4

Now solve for y 

y=x-1
y = 4 - 1
y = 3

Answer: y = 3 and x = 4

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Answers

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When you often tried to find an amount of a percent of a certain number, you need to multiply the percent with the total then divide by a 100, there is still others way other than this, but this all I know, take 55 times 200 you got 110, that the answer
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