Let, digital cameras be "x" video cameras be "y" Now, According to the question, 5x + 3y = $3,213..................................................equation (1) y = 4x..................................................................equation (2)
Taking equation (1) 5x + 3y = $3,213 Substituting the value of "y" from equation (2), we get, 5x + 3(4x) = $3,213 5x + 12x = $3,213 17x = $3,213 x = $3,213 / 17 x = $189
Taking equation (2) y = 4x Substituting the value of "x", we get, y = 4 ($189) y = $756
Now, John buys a digital and a video camera. So, it costs him ($189 + $756) = $945
John payed 189 f or d i g i t a l c am er aan d 756 for video camera and a total sum of $ 945.
Let's define the cost of each digital camera as x. Since each video camera costs 4 times as much as each digital camera, we define the cost of each video camera as 4x. The total cost for 5 digital cameras and 3 video cameras is $3,213, thus we can write the equation: 5x + 3(4x) = 3,213.
Expanding this, we get: 5x + 12x = 3,213 which simplifies to: 17x = 3,213.
Dividing both sides by 17 gives us the cost of one digital camera: x = 189.
Therefore, the cost of one video camera is: 4x = 4(189) = 756. If John buys a digital camera and a video camera, he will pay: 189 + 756 = $945.
John pays a total of $945 for one digital camera and one video camera. The digital camera costs $189, and the video camera costs $756. This information is derived from the equations representing their costs based on the total given.
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Jawaban yang tepat adalah: setelah tiga tahun Letda Pnb Ajeng lulus dari AAU Penjelasan singkat: Letda Pnb Ajeng Tresna Dwi Wijayanti dilantik menjadi penerbang tempur wanita pertama di TNI AU pada tahun 2021, tiga tahun setelah ia lulus dari Akademi Angkatan Udara (AAU) pada tahun 2018. Maka, peristiwa itu terjadi setelah tiga tahun Letda Pnb Ajeng lulus dari AAU.