1. упростить выражение
a) -6x*3y*(-5)
2. Приведите подобные слагаемые и упростите
-5k+12p-8k-13p+7k
3. Решить уравнение
а) 7m-11=10m+16
б) 0,4(6x-7)=0,5(3x+7)
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