Algebra
posted by G on .
Why is first equation is x negative and in equations 2,3 & 4 answers are not negative and also sign changes?
1)Equation: x+y>1
Answer: y=x+1
2)Equation: xy>5
Answer: y<x5
3)Equation: 3xy<2
Answer: y>3x2
Sign is greater than or equal to in the following equation.
4)Equation: x3y>9
Sign is less than or equal to in the answer.
Answer: y<1/3x3

In equation 1, the > cannot chamge to =
Subtract x from both sides to get
y > x+1
In equation 2, add y5 to both sides to get x5 > y, thish is the same as
y < x5