a) 2x = 15 -35;
2x = - 20
x= -20 : 2
x =-10;
b) 7x+14 =0;
7x = -14;
x = -14 : 7;
x=-2;
c) -2x + 3 = -7;
-2x = -7 -3;
-2x =-10;
x =(-10) : (-2);
x =5;
d)
-3x + 5 = -10;
-3x = -10 - 5;
-3x = -15;
x =(-15) : (-3)
x = 5;
e)-5x+5=5
-5x = 5-5;
-5x =0;
x = 0 : (-5);
x=0;
