Question

7) 2x - 3x4 7
8) 2.(x+2)+ 3x = 16
9) 1x)
f
10)x²=9
11)/24+3 14
12) 2* = 4²​

Answer 1

Răspuns:

8)

2*(x+2)+ 3x = 16

2x + 4 + 3x = 16

5x = 16 - 4

5x = 12

x = 12/5

10)

x²=9

x²=3²

x1,2 = +-3

12)

2^x = 4²

2^x = (2²)²

2^x = 2^4

x = 4