Answer:
x = ± 13
Step-by-step explanation:
Given
x² = 169 ( take the square root of both sides )
x = ± = ± 13
Since 13 × 13 = 169 and - 13× - 13 = 169
The price of an item yesterday was 135 . Today, the price fell to 54. Find the percentage decrease.
2 answers:
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Greetings!
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Typically when solving an equation with one variable, your objective is to isolate the variable on one side of the equation. This can be done adding/subtracting number to cancel them out on one side. You can also multiply/divide coefficients in order to isolate a variable.
Example:
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<span>Add -4 to both sides to isolate the variable.
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Simplify.
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Divide both sides by 2 to isolate the variable on one side.
Hope this helps.
-Benjamin
"<span>What is the general process for solving an equation with one variable?"...
Typically when solving an equation with one variable, your objective is to isolate the variable on one side of the equation. This can be done adding/subtracting number to cancel them out on one side. You can also multiply/divide coefficients in order to isolate a variable.
Example:
</span>
<span>Add -4 to both sides to isolate the variable.
</span>
Simplify.
</span>
Divide both sides by 2 to isolate the variable on one side.
Hope this helps.
-Benjamin