Isolate z: Which operation should be used to isolate z?In 30.1=3.1−(0.1z), we should first add (0.1z) to both sides to isolate the term containing z.Add (0.1z) to both sides.
Add to both sides:30.1+(0.1z)=3.1Now, subtract 3.1 from both sides to get z by itself.30.1−3.1=(0.1z)
Subtract from both sides: Calculate the left side of the equation.30.1−3.1=27So, 27=0.1z
Calculate left side: Which operation should be used to solve for z?We should multiply both sides by 0.1 to solve for z.Multiply by 0.127×0.1=z
Solve for z: Calculate the value of z.27×0.1=2.7z=2.7
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