2x - 10 = 40 14 + (9 - x) = 20

Question

2x - 10 = 40
14 + (9 - x) = 20

Answer 1

2х-10=40
2х=40+10
2х=50
х=50:2
х=25

14+(9-х)=20
14+9-х=20
23-х=20
-х=20-23
-х=-3
х=3

Answer 2

2x10+40
2x=50
2x=50/2
2x=25