Quandaries
and Queries |
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Name: davis Who is asking: Parent Level of the question: All Question: 3z-5+2z=25-5z |
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Hi Davis, I find it sometimes helps with a problem like this to think of the equation as a balance with the balance point at the equal sign. The object is to manipulate the terms on each side, without distorting the balance, and end with an equation of the form
That is with the z alone on one side of the equation, and a number on the other side. With this equation I would first gather the z-terms on the left of the equation to get
To eliminate the z-term from the right side of the equation, add 5z to both sides. This maintains the balance and you get
Now add 5 to both sides, again maintaining the balance to get
Finally divide both sides by 10 to get
Penny |