Answer:
X-7<15
X-7+7<15+7
X<22
x < 22
Explanation:
x - 7 < 15
Adding 7 to both sides.
=> (x - 7 ) + 7 < 15 + 7
=> x - 7 + 7 < 22
=> x < 15+ 7
=> x< 22
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