It should be 13 since 13+8 = 21. 21-7 = 13
For CO2 there is one atom of carbon and two atoms of oxygen. For H2O, there is one atom of oxygen and two atoms of hydrogen.
x=4 because if you add 7 to 10 you get -2x-3=-14x then you add -2x to -14x and you get -3=-12 then you divide by -3 and -12 to get 4
It is equivalent to 17.7165 inches.
Answer:
1
Step-by-step explanation:
