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Пошаговое объяснение:
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160 : (4 * 10) = 160 : 40 = 4
160 : (4 * 10) = 160 : 4 : 10 = 40 : 10 = 4
160 : (4 * 10) = 160 : 10 : 4 = 16 : 4 = 4
810 : (30 * 3) = 810 : 90 = 9
810 : (30 * 3) = 810 : 30 : 3 = 27 : 3 = 9
810 : (30 * 3) = 810 : 3 : 30 = 270 : 30 = 9
420 : (2 * 3) = 420 : 6 = 70
420 : (2 * 3) = 420 : 2 : 3 = 210 : 3 = 70
420 : (2 * 3) = 420 : 3 : 2 = 140 : 2 = 70
480 : (20 * 4) = 480 : 80 = 6
480 : (20 * 4) = 480 : 20 : 4 = 24 : 4 = 6
480 : (20 * 4) = 480 : 4 : 20 = 120 : 20 = 6
720 : (9 * 10) = 720 : 90 = 8
720 : (9 * 10) = 720 : 9 : 10 = 8
720 : (9 * 10) = 720 : 10 : 9 = 72 : 9 = 8
360 : (3 * 2) = 360 : 6 = 60
360 : (3 * 2) = 360 : 3 : 2 = 120 : 2 = 60
360 : (3 * 2) = 360 : 2 : 3 = 180 : 3 = 60
560 : (10 * 8) = 560 : 80 = 7
560 : (10 * 8) = 560 : 10 : 8 = 56 : 8 = 7
560 : (10 * 8) = 560 : 8 : 10 = 70 : 10 = 7
630 : (3 * 30) = 630 : 90 = 7
630 : (3 * 30) = 630 : 3 : 30 = 210 : 30 = 7
630 : (3 * 30) = 630 : 30 : 3 = 21 : 3 = 7
Х-30 стоит1кг яблок
3(х-30)=х
3х-90=х
3х-х=90
2х=90
Х=45р. Стоит1кг груш
45-30=15р. Стоит1кг яблок