Х+547=839 . а*30=150-60

Question

Х+547=839 . а*30=150-60

Answer 1

Х=839-547
х=292
292+547=839

Answer 2

Х +547 = 839
Х = 839 - 547
Х =  292
292 + 547 = 839 
          839 =  839
а*30 = 150 - 60
а*30 = 90
а= 90: 30
а = 3
3*30 = 90
    90 = 90