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IS2511
@IS2511
July 2022
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Номер 426 и 533. Помогите решить.
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bkmzpfv
426.
1) (х - 4.7) * 7.3 = 38.69
х - 4.7=5.3
х = 5.3 +4.7
х = 10
2) (3.6 - а ) *5.8 = 14.5
3.6 - а = 2.5
а = 3.6 - 2.5
а = 1.1
3) 23.5 - ( 2.3а + 1.2а) = 19.3
3.5а = 23.5 - 19.3
3.5а = 4.2
а = 4.2/3.5
а = 1.2
4) 12.98 - ( 3.8х - 1.3х) = 11.23
12.98 - 2.5х = 11.23
2.5х = 12.98 - 11.23
2.5х = 1.75
х = 1.75/2.5
х = 0.7
№533
X+2X+(X+8)=76
3X+X+8=76
4X+8=76
4X=76-8
4X=68
X=68/4
X=17
В первом ящике 17,
во втором 17*2 = 34 кг
в третьем 17 + 8 = 25 кг
4 votes
Thanks 7
IS2511
А 533
bkmzpfv
Изменил, добавил решение 533 в низу
IS2511
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Answers & Comments
1) (х - 4.7) * 7.3 = 38.69
х - 4.7=5.3
х = 5.3 +4.7
х = 10
2) (3.6 - а ) *5.8 = 14.5
3.6 - а = 2.5
а = 3.6 - 2.5
а = 1.1
3) 23.5 - ( 2.3а + 1.2а) = 19.3
3.5а = 23.5 - 19.3
3.5а = 4.2
а = 4.2/3.5
а = 1.2
4) 12.98 - ( 3.8х - 1.3х) = 11.23
12.98 - 2.5х = 11.23
2.5х = 12.98 - 11.23
2.5х = 1.75
х = 1.75/2.5
х = 0.7
№533
X+2X+(X+8)=76
3X+X+8=76
4X+8=76
4X=76-8
4X=68
X=68/4
X=17
В первом ящике 17,
во втором 17*2 = 34 кг
в третьем 17 + 8 = 25 кг