Вопрос школьника по предмету Математика
Решите уравнение: а) 8,4-(x-7,2)=8,6
б)-1,3+(x-4,8)= -7,1
г)3,3-(x-6,7)=100
Ответ учителя по предмету Математика
a) x-7,2=8,4-8,6
x-7,2=-0,2
x=7,2-0,2
x=7
b) x-4,8=-7,1+1,3
x-4,8=-5,8
x=-5,8+4,8
x=-1
c) x-6,7=3,3-100
x-6,7=-96,7
x=-96,7+6,7
x=-90
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