Вопрос школьника по предмету Математика
Реши уравнение
1)-15у-24=7у+131
2)1/4Х+7=20-1/12х
3)8(9+х)-5х=4х-58
Ответ учителя по предмету Математика
Ответ:
1)y=-7,045; 2)x=39; 3)x=130
Пошаговое объяснение:
1)-22y=155,
y=155/-22,
y=-7,045.
2)³^1/4x+7=20-1/12x,
3/12x+1/12x=20-7,
4/12x=13,
1/3x=13,
x=13÷1/3=13×3/1,
x=39.
3)72+8x-5x=4x-58,
72+3x=4x-58,
3x-4x=-58-72,
-x=-130,
x=130
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