а) 80, 6 - (x - 7, 98) = 63, 4
80.6 – x + 7.98 = 63.4
– x = 63,4 – 7,98 – 80,6
-x = -25.18
x = 25.18
б) 3,97х+20,4х+0,63х=5050
3,97x + 20,4x + 0,63x = 5050
25x = 5050
x = 202
а) 80, 6 - (x - 7, 98) = 63, 4
80.6 – x + 7.98 = 63.4
– x = 63,4 – 7,98 – 80,6
-x = -25.18
x = 25.18
б) 3,97х+20,4х+0,63х=5050
3,97x + 20,4x + 0,63x = 5050
25x = 5050
x = 202