Ответ:
1)3а+8а=1,87
11а=1,87
а=1,87÷11
а=0,17
3×0,17+8×0,17=1,87
2)7z-3z=5,12
4z=5,12
z=5,12÷4
z=1,28
7×1,28-3×1,28=5,12
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Ответ:
1)3а+8а=1,87
11а=1,87
а=1,87÷11
а=0,17
3×0,17+8×0,17=1,87
2)7z-3z=5,12
4z=5,12
z=5,12÷4
z=1,28
7×1,28-3×1,28=5,12
а=0,17
2.4z=5,12
z=1,28