the measure of the second angle of a triangle is twice the measure of the first angle. the measure of the third angle is 10 degr
2 answers:
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Answer:
See below.
Step-by-step explanation:
because we combine like terms. You will essentially ignore the x and just do -2 + 1, which is -1. So, the answer would be -1x which is simply just -x.
To see why we can combine like terms, use the distributive property. So we have:
This is the same thing as saying:
Factor out the x:
Add:
And simplify: