42x – 28x + 180 = 600
42x – 28x = 600 – 180
14x = 420
x = 30
42x-28x+180=600
14х=600-180
14х=420
х=30
42x – 28x + 180 = 600
42x – 28x = 600 – 180
14x = 420
x = 30
42x-28x+180=600
14х=600-180
14х=420
х=30