x+x+9=18
9x=18
X= -81/9
x=-9
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Answered by
2
Answer:
x-9 mark me brainlest and follow me
Answered by
0
Step-by-step explanation:
x+x+9=18
2x=18-9
2x=9
x=9/2
x=4.5 or45/10
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