III. x + x +15 + 3x = 60
Tenglamani yechamiz: 5x + 15 = 60; 5x = 60+15;
5x = 75; x = 75 : 5; x = 15.
Demak, ikkinchi sisternada 15 tonna benzin bor.
Javob: 15 tonna benzin. Baho : 3 ball.
Tenglamani yechioshda xatoga yo’l qo’ygan suning uchun javob noto’g’ri.
IV. x + 15 + 3x = 60
Tenglamani yechamiz: 4x + 15 = 60; 4x = 60-15; 4x = 45;
Demak, ikkinchi sisternada tonna benzin bor.
Javob: tonna benzin. Baho : 4 ball.
Tenglama noto’g’ri tuzilgan, ya’ni masalaning yechish yo’li xato bo’lgani uchun noto’g’ri javob kelib chiqqan.
V. 15 + 3x = 60
Tenglamani yechamiz: 3x = 60 + 15; 3x = 75; x = 75 : 3; x = 15
Demak, ikkinchi sisternada 15 tonna benzin bor.
Javob: 15 tonna. Baho: 1 ball.
Masala yechish yo’li xato bo’lgani uchun noto’g’ri javob kelb chiqqan.
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