Solve the system of equations
x + y = 7
-x +2y = 5

x + y =7

x + y + −y = 7 + −y

x = −y + 7

x = −y + 7

−x + 2y = 5

−x + 2y + −2y = 5 + −2y

−x = −2y + 5

−x /−1  =  −2y+5 /−1

x=2y−5

x=2y−5

b.) divide by -5.

step-by-step explanation:

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.