godstruelove122
30.12.2021 •
Mathematics
The perimeter of a rectangle is equal to 10. If the length is halved and the width is doubled, the new perimeter is increased by 4. What
is the length of the original rectangle?
4 1 2 3
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Ответ:
Step-by-step explanation:
Let's call x the lenght and y the height. The perimeter will be:
p = 2x + 2y = 10
When the lenght is halved and the height double we'll have:
p = x + 4y = 14
These 2 equations form a system of equations2 that can be solved and give as result:
y = 3
x = 2
Ответ:
answer:
-2(x+1)=8=x=-5=