What is an equation?
solve equations

Flashcard
•
Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An equation is a mathematical statement that asserts the equality of two expressions, typically containing variables.
2.
FLASHCARD QUESTION
Front
What does it mean to solve an equation?
Back
To solve an equation means to find the value(s) of the variable(s) that make the equation true.
3.
FLASHCARD QUESTION
Front
What is the first step in solving the equation 19 - 2k = 3k - 1?
Back
The first step is to isolate the variable on one side of the equation, typically by moving all terms involving the variable to one side.
4.
FLASHCARD QUESTION
Front
What is the error in the following steps? 19 - 2k = 3k - 1; +3k; 19 + 1k = -1; -19; k = -20
Back
The error is that instead of adding 3k, they should have subtracted 3k.
5.
FLASHCARD QUESTION
Front
How do you isolate a variable in an equation?
Back
To isolate a variable, you perform inverse operations to move other terms to the opposite side of the equation.
6.
FLASHCARD QUESTION
Front
What is the solution to the equation 9 + 3x = 10?
Back
x = 1/3.
7.
FLASHCARD QUESTION
Front
How do you write an equation for 'A number is doubled, then 9 is added, and the result is 23'?
Back
The equation is 2x + 9 = 23.
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