This is the concept of algebra. from the given equation;
y-9+9=-17+9
The original equation was y-9=-17
The subtraction was undone by applying inverse operation of adding 9 to get;
y-9+9=-17+9
y=-8
The aim of doing this was to obtain the value of the unknown which is y
Answer:
y < 160
Step-by-step explanation:
y + 20 < 180
-20 < -20
y < 160
y is less than 160
Answer:
C
Step-by-step explanation:
Test Numbers with each equation or Simplify
Simplified, C's equation equates to 0 which would make it infinite

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