Question

35 баллов срочно тест

Answer 1

1). 6x - 4x = -2,2 + 10,2
2x = 8 | : 2
x = 4

5). 21x + 7 - 11x = 2
21x - 11x = 2 - 7
10x = - 5 | : 10
x = -0,5

7). 2x - 1 + 1 = 9
2x = 9 + 1 - 1
2x = 9 | : 2
x= 4,5