Ответ:
1) 8t+12=2t+18
8t-2t=18-12
6t=6
t=1
2) 6x-17=4x+17
6x-4x=17+17
2x=34
x=17
3)
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Ответ:
1) 8t+12=2t+18
8t-2t=18-12
6t=6
t=1
2) 6x-17=4x+17
6x-4x=17+17
2x=34
x=17
3)
7t=49
t=7
4)7x+2x=66-3
9x=63
X=7