(-4) : (-2) × 7 =serta cara..​

N = 1000 w + 100 x + 10 y + z w = z = 1 x , y ∈ { 0 , 1 , 2 , … , 7 , 8 , 9 } 10 x + y = 21 N ​ 10 x + y = 21 1000 w + 100 x + 10 y + z ​ 10 x + y = 21 1000 + 100 x + 10 y + 1 ​ 10 x + y = 21 100 x + 10 y + 1001 ​ 210 x + 21 y = 100 x + 10 y + 1001 110 x + 11 y − 1001 = 0 10 x + y − 91 = 0 y = − 10 x + 91 The above equation meets the condition x , y ∈ { 0 , 1 , 2 , … , 7 , 8 , 9 } only for x = 9 : y = − 10 ⋅ 9 + 91 y = − 90 + 91 y = 1 Therefore: N = 1000 ⋅ 1 + 100 ⋅ 9 + 10 ⋅ 1 + 1 N = 1000 + 900 + 10 + 1 N = 1911 ​

Answered by konrad509 | 2024-06-10

The four-digit number N with both the leftmost and rightmost digits equal to 1 is 1911 . We solved for N by establishing relationships between the digits and using algebra. The valid digits found were x = 9 and y = 1 .
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Answered by konrad509 | 2024-12-26

Jawaban:pembagian terlebih dahulu:-4 : -2 = 2 (karena bilangan negatif dibagi bilangan negatif hasilnya positif).Kemudian, kalikan hasilnya dengan 7:2 × 7 = 14

Answered by lenarizky24 | 2025-08-21