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Hatter6998
31.12.2019 •
Mathematics
Justify each step. 2x-5=-20 2x=-15 x=-15/2
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Ответ:
2x - 5 = -20
now simple number -5 goes to the other side of equation and turns into +5, then the equation becomes
2x = -20 +5
now we get 2x = -15
because -20 + 5 = -15, greater number is 20 then 5 and 20 is with - sign.
the next step is x = -15/2
in 2x, 2 is multiplying with x when it goes to the other side of equation 2 will be divided with -15, that's why we get
x = -15/2
which is the value of x
Ответ:
Third side must be greater than 7 and less than 17
Step-by-step explanation:
If a triangle has two sides of lengths 5 and 12, the value for the length of the third side be greater than 7 and less than 17.