diketahui persamaan linier 10x + 3y = 610 5x + 4y =480 maka nilai x adalah............
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diketahui persamaan linier 10x + 3y = 610 5x + 4y =480 maka nilai x adalah............
1 Jawaban
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1. Jawaban fatimah3085
10x + 3y = 610
5x + 4y = 480 |×2
10x + 3y = 610
10x + 8y = 960
-----------------------(-)
- 5y = - 350
y = 70
5x + 4y = 480
5x + 4(70) = 480
5x = 480 - 280
x = 200 ÷ 5
x = 40