ISEE Lower Level Math : How to find the solution to an equation

Study concepts, example questions & explanations for ISEE Lower Level Math

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Example Questions

Example Question #81 :Equations

If, and, then what is the value of?

Possible Answers:

Correct answer:

Explanation:

If, and, the first step is to plug inas the value of.

Subtractfrom each side.

Divide each side by 3.

Example Question #82 :Equations

If, what is the value ofif?

Possible Answers:

Correct answer:

Explanation:

If, and, the first step is to plug infor:

Divide each side by.

Example Question #83 :Equations

Simplify the expression below:

Possible Answers:

Correct answer:

Explanation:

The first step is to simplifyingis to apply the distributive property to the first parenthetical.

Next, we reduce the multiplication expression in the second parenthetical.

Next, we combine like terms.

Example Question #84 :Equations

What is the value ofin the equation below?

Possible Answers:

Correct answer:

Explanation:

To solve for the equation, follow the steps below:

Subtractfrom each side.

Divide each side by.

.

Therefore,is the correct answer.

Example Question #85 :Equations

Solve for.

Possible Answers:

Correct answer:

Explanation:

To solve for, follow the steps below:

Addto each side.

Subtractfrom each side.

Divide each side by.

Therefore, the correct answer is.

Example Question #86 :Equations

Solve forin the equation below:

Possible Answers:

Correct answer:

Explanation:

The first step to solving this equation is to make sure the fractions have common denominators.

Given that, the equation can be rewritten as:

Sinceis equal to, the value ofmust bebecause

Therefore,is the correct answer.

Example Question #87 :Equations

What is the value of x if 5 less than x is equal to 14?

Possible Answers:

Correct answer:

Explanation:

if 5 less than x is equal to 14, then.

To solve this, 5 should be added to each side of the equation, which results in.

Example Question #88 :Equations

Solve for x:

Possible Answers:

Correct answer:

Explanation:

First, square 2:

Next, add together 41 and 4:

Add 18 to both sides:

Divide both sides by 7:

Example Question #89 :Equations

Solve for:

Possible Answers:

Correct answer:

Explanation:

First, "move" all of the variables to one side of the equation:

Next, "move" the other numbers to the right side of the equation:

Simplify:

Now, divide both sides by:

Thus, you get:

Example Question #90 :Equations

Which number can fill in the blank to complete the equation correctly?

___

Possible Answers:

Correct answer:

Explanation:

Fill in the blank with a number that will make the equation true. On the right side,, so the left side needs to equalalso. "Something". If you test the answers,is the number that makes the equation true, sois the correct answer.

Alternatively,is the same as, so "something". That "something" would be, sois the correct answer.

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