Suatu desa terdapat 200 keluarga, rata-rata jumlah anggota setiap keluarga 6 orang, dan jumlah orang dewasa seluruhnya adalah 500 orang. Suatu saat desa tersebut terserang wabah dengan peluang terjangkit bagi dewasa 0,3 dan bagi anak-anak 0,7. Berapa orang yang diperkirakan akan terjangkit wabah tersebut?

There are 8 problems in the picture. What you need is for someone to give you some tips and solve one or two of them. Giving you a bunch of answers and nothing else does NOT help you.
Here are my tips to you:
A). You're always trying to find the number that the unknown letter must be equal to, in order to make the equation a true statement. That's the solution to the equation, and the 'answer' to the problem.
B). Always do what you have to do in order to get the letter all by itself on one side.
C). Whatever you do to one side of the equation, you must do to the other side.
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Examples, from the picture:
#3: 8x - 2 = -9 + 7x What can you do to get the 'x' all alone on one side?
Subtract 7x from each side: x - 2 = -9
Add 2 to each side: x = -7
#2: 6 = 1 - 2n + 5
Combine the 1 and the +5 on the right side: 6 = 6 - 2n
What can you do to get the 'n' all alone on one side?
Subtract 6 from each side: 0 = - 2n
Divide each side by -2 : 0 = n
#5: 4m - 4 = 4m
Subtract 4m from each side: - 4 = 0
There is no number for 'm' that can make -4 equal to zero. So this equation has no solution .
(That's OK. Not every equation must have a solution.)

Answered by AL2006 | 2024-06-10

To solve multi-step equations, aim to isolate the variable by using inverse operations while maintaining balance in the equation. Performing the same operation on both sides keeps the equality intact. Practice with various examples to become more comfortable with the methods.
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Answered by AL2006 | 2024-10-01

JAWAB:Diperkirakan 640 orang akan terjangkit wabah di desa tersebut.PENJELASAN:Total Penduduk: 200 keluarga × 6 orang/keluarga = 1.200 orangJumlah Anak-anak: 1.200 total penduduk - 500 orang dewasa = 700 anak-anakPerkiraan Dewasa Terjangkit: 500 orang dewasa × 0,3 = 150 orangPerkiraan Anak-anak Terjangkit: 700 anak-anak × 0,7 = 490 orangTotal Perkiraan Terjangkit: 150 orang dewasa + 490 anak-anak = 640 orang

Answered by tommybrutalid | 2025-07-05