Respuesta :

suspho9

Answer:

9.               x = 103

10.             x = 50

Step-by-step explanation:

9)

x + x - 26 = 180

2x = 180 + 26

2x = 206

x = 206 : 2

x = 103

check

103 + 103 - 26 = 180

180 = 180

the answer is good

10.

2x - 40 = x + 10

x = 40 + 10

x = 50

check

2 * 50 - 40 = 50 + 10

60 = 60

the answer is good