3а+2а=75
5а=75
а=75/5
а=15
14x – 3x – 6x = 15
5x = 15
x = 3
2x + 4x + 7x = 26
13x = 26
x = 2
9z + 3z – 13 = 155
9z + 3z = 155 + 13
12z = 168
z = 14
3а+2а=75
5а=75
а=75/5
а=15
14x – 3x – 6x = 15
5x = 15
x = 3
2x + 4x + 7x = 26
13x = 26
x = 2
9z + 3z – 13 = 155
9z + 3z = 155 + 13
12z = 168
z = 14