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Question:

Solve the inequality: x + 10 < 19

A x < 9
Explaination

To “undo” adding 10, we subtract 10 from both sides of the inequality.
Original inquality.
x + 10 < 19
Subtract 10 from both sides.
x + 10 − 10 < 19 − 10
Simplify both sides.
x < 9