а) -2(а+5)+3=2-3(а+1)
б) 0,2(м-2)-0,4(м+3)=0,4-0,6м
в) 0,2(у-3)-1=0,5(у+3)-0,4
г) 0,3(n-4)-0,7(n-3)=4,9-0,9n
Помогите решить пожалуйста!!!

а)-2a-10+3=2-3a-3 -2a-7=-3a-1 -2a+3a=-1+7 ;a=6-2(6+5)+3=2-3(6+1)  -19=-19б)0,2m-0.4-0.4m-1.2=0.4-0.6m  -0.2m-1.6=0.4-0.6m  -0.2m+0.6m=0.4+1.6  0.4m=2 m=5 0.2(5-2)-0.4(5+3)=0.4-0.6*5 2.6=2.6в)0,2y-0.6-1=0.5y+1.5-0.4 0.2y-1.6=0.5y+1.1 0.2y-0.5y=1.1+1.6  -0.3y=2.7  y=-9  0.2(-9-3)-1=0.5(-9+3)-0.4 -3.4=-3.4г)0,3n-1.2-0.7n+2.1=4.9-0.9n-0.4n+0.9=4.9-0.9n-0.4n+0.9n=4.9-0.90.5n=4n=80.3(8-4)-0.7(8-3)=4.9-0.9*8-2.3=-2.3