Step-by-step explanation:
3 is cross multiplication
2 is proportion
and 1 is equal
The number + 10 can be used to indicate a :
10 degree rise in temperature.
Temperature can be measured in Kelvin , Celsius, and Fahrenheit. In all measurement, + number indicate a rise in the temperature
For the first one it would be 3(9 x 20)
And for the second one it would be 8
-12. Subtract 8 from both sides.
x=1/2
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