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To begin with we address the parenthesis:
Remember that:
When we multiply a positive number by a negative number, the result will be negative.
When we multiply a negative number by a negative number, the result will be positive.
Thus we obtain the following:
We then join the x coefficients:
We join the y coefficients:
Lastly we obtain:
\( 70:(14\times5)= \)
When you have a negative sign in front of parentheses, it multiplies each term inside. So because negative times negative equals positive!
Like terms have the exact same variable part. In this problem, 13x and 6x are like terms (both have x), and 4y and 3y are like terms (both have y).
No! You cannot combine terms with different variables. stays as - they are not like terms and cannot be combined.
You'll get the wrong answer! Always write out each step: first distribute the negative, then identify like terms, then combine. Taking shortcuts often leads to sign errors.
Yes! Pick simple values for x and y (like x=1, y=1) and substitute into both the original expression and your answer. If they give the same result, you're correct!
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