преобразуй уравнение и реши их 8х-5х-3=6 2+6а+4а=92 2х-15+8х=5

Question

преобразуй уравнение и реши их 8х-5х-3=6 2+6а+4а=92 2х-15+8х=5

Answer 1

8х-5х-3=6
3х = 6 + 3
3х = 9
х = 9 : 3
х = 3
8*3 - 5*3 - 3 = 6
24 - 15 - 3 = 6
6 = 6

2+6а+4а=92
10а = 92 - 2
10а = 90
а = 90 : 10
а = 9
2 + 6*9 + 4*9 = 92
2 + 54 + 36 = 92
2 + 90 = 92
92 = 92

2х-15+8х=5
10х = 5 + 15
10х = 20
х = 20 : 10
х = 2
2 * 2 - 15 + 8*2 =5
4 - 15 + 16 = 5
5 = 5

Answer 2

8x-5x-3=6
3x=9
x=2

2+6a+4a=92
10a=90
a=9

2x-15+8x=15
10x=30
x=3

Comments

да, в 1 x=3

---

2x-15+8x=5; 10x=20; x=2