1) (7,2-4,5)-(5,5-4,5)=
2) -(3,6-y)+(-y-2,6)=
3) 2,5x-4,2c+6,4c+12x=
4) 3*(-2a+4)-5a=
5) -4x=-24
6) 2y-4=-19-3y

1. =2.7-1=1.72. =-3.6+y+y-2.6=-6.2+2y=2(-3.1+y)3.=14.5x+2.2c4. =-6a+12-5a=-11a-125. x=-24/-4       x=66. 2y+3y=19+4    5y=23y=23/5=4.6