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-3x-5x=-7+1
-10x=-6 /:(-10)
x=0,6
5y+1=2y-10
5y-2y=-10-1
3y=-11
y=-11/3
y= -3 ²/₃
0,3-0,12x=-0,42
-0,12x=-0,42+0,3
-0,12x=-0,12
x=1
1/7 *(x+1,4)=0,1 /*7
x+1,4=0,7
x=0,7-1,4
x= -0,7