X+x+200+X*3=1400 Помогите

Question

X+x+200+X*3=1400 Помогите

Answer 1

Х+х+200+х*3=1400
2х+200+3х=1400
5х=1400-200
5х=1200
х=240

Answer 2

5x+200=1400
5x=1200
x= 240