Ответ:
1) 2.6a-0.6a+1.8=1a-3
2a-1a=-3-1.8
a=-4.8
2)-1.2y+1.8-3.6+0.4y=-0.3y+2.7
-0.8y+0.3y=2.7+1.8
-0.5y=4.5
y=-9
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Ответ:
1) 2.6a-0.6a+1.8=1a-3
2a-1a=-3-1.8
a=-4.8
2)-1.2y+1.8-3.6+0.4y=-0.3y+2.7
-0.8y+0.3y=2.7+1.8
-0.5y=4.5
y=-9