Решите уравнение С:4×+7=010×+9=7×5-2×=11-7•(×+2)10•(×-9)=71-5×=-6×+84×+7=0

Предыдущий
вопрос Следующий
вопрос

1) 4× + 7 = 0
4× = -7
× = -7/4

2) 10× + 9 = 7
10× = -2
× = -2/10
× = -1/5

3) 5× - 2× = 11
3× = 11
× = 11/3

4) 7 • (× + 2) = 11
7× + 14 = 11
7× = -3
× = -3/7

5) 10 • (× - 9) = 71
10× - 90 = 71
10× = 161
× = 161/10
× = 16.1

6) -5× = -6
× = -6/-5
× = 6/5
× = 1.2

7) 84× + 7 = 0
84× = -7
× = -7/84
× = -1/12.