1)3а+8а=1,87
11а=1,87 а=1,87/11 а=0,17
2)7 z - 3z = 5,12 z * (7 - 3) = 5,12 4z = 5,12 z = 5,12 / 4
z= 1,28
3)2t + 5t + 3,18 = 25,3 2t + 5t = 25,3 - 3,18 t(2+5) = 22,12 7t = 22,12 t = 22,12 / 7 = 3,16
1)3а+8а=1,87
11а=1,87
а=1,87/11
а=0,17
2)7 z - 3z = 5,12
z * (7 - 3) = 5,12
4z = 5,12
z = 5,12 / 4
z= 1,28
3)2t + 5t + 3,18 = 25,3
2t + 5t = 25,3 - 3,18
t(2+5) = 22,12
7t = 22,12
t = 22,12 / 7 = 3,16