4x + 5x + 4.7 = 16.4
4x + 5x = 16,4 – 4,7
9x = 11.7
x = 1.3
0.7x – 0.4x + 46 = 211
0,7x – 0,4x = 211 – 46
0.3x = 165
x = 550
4x + 5x + 4.7 = 16.4
4x + 5x = 16,4 – 4,7
9x = 11.7
x = 1.3
0.7x – 0.4x + 46 = 211
0,7x – 0,4x = 211 – 46
0.3x = 165
x = 550