<u>Solve for x:</u>
Add 4.3x on both sides so that the variable can be on one side.
9.6x - 15.4 = -4.3x + 26.3
+4.3x +4.3x
Add 15.4 on both sides so that the whole number stays on one side separate from the variable.
13.9x - 15.4 = 26.3
+15.4 +15.4
Divide both sides by 13.9.
13.9x = 41.7
------- -----
13.9 13.9
Now you get a solution of:
x = 3
<u>Check:</u>
9.6(3) - 15.4 = -4.3(3) + 26.3
28.8 - 15.4 = -12.9 + 26.3
13.4 = 13.4
Answer:
D
Step-by-step explanation:
C
Because they can both be simplified to 2/3
It would be 11 + 12 = 23 atomic mass units.
(electrons have about a mass of 5.489×10−4<span> atomic mass units, so their mass would be negligible in this calculation).
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