180а+684=30a+1134
180a-30a=1134-684
150a=450
a=3
602t-292=912
602t=912+292
602t=1204
t=2
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180а+684=30a+1134
180a-30a=1134-684
150a=450
a=3
602t-292=912
602t=912+292
602t=1204
t=2