1) 150 - x : 2 = 140150 - x = 280-x = 280 - 150-x = 130x = -130
2) (150 - x) : 2 = 65150 - x = 130-x = 130 - 150-x = -20x = 20
3) (300 - 18) x = 1410282 x = 1410x = 1410 / 282x = 5
4) 5x - 600 = 9005x = 900 + 6005x = 1500x = 1500 / 5x = 300
Решения уравнений:1) x = -1302) x = 203) x = 54) x = 300
1) 150 - x : 2 = 140
150 - x = 280
-x = 280 - 150
-x = 130
x = -130
2) (150 - x) : 2 = 65
150 - x = 130
-x = 130 - 150
-x = -20
x = 20
3) (300 - 18) x = 1410
282 x = 1410
x = 1410 / 282
x = 5
4) 5x - 600 = 900
5x = 900 + 600
5x = 1500
x = 1500 / 5
x = 300
Решения уравнений:
1) x = -130
2) x = 20
3) x = 5
4) x = 300