find the value of x
no irrelevant answer
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Answered by
1
Answer:
x=30
Step-by-step explanation:
x+x+30=90
=>2x=90-30
=>x=60/2
=>x=30
Answered by
0
Answer:
Combustion is the scientific word for burning. In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat. This is why you see flames when things burn.
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