a)2a-3=a+1 2a-a=1+3 a=4 b)5d+2=3d 5d-3d=-2 2d=-2 d=-1 c)4b+3=3b-4 4b-3b=-4-3 b=-7 d)6e-2=7e+5 6e-7e=5+2 e=7 e)7+3c=-5=2c 3c-2c=-5-7 c=-12 f)6f-1=f+2 6f-f=2+1 5f=3 |:5 f=⅗ prosz... ;]]
a) 2a-3=a+1 /+3 2a = a+4 /-a a = 4 b) 5d+2=3d /-3d 2d+2 = 0 /-2 2d = -2 /:2 d = -1 c) 4b+3 = 3b-4 /+4 4b+7 = 3b /-4b 7 = -b /:(-1) -7 = b d) 6e -2 = 7e+5 /+2 6e = 7e+7 /-7e -e = 7 /:(-1) e = -7 e) 7 +3c = -5+2c /-2c 7 + c = -5 /-7 c = -12 f) 6f-1 = f+2 /+1 6f = f+3 /-f 5f = 3 /:5 f = 3/5 f = 0,6
a)2a-3=a+1/+3 2a=a+4/-a a=4 b)5d+2=3d/-3d 2d+2=0/-2 2d=-2 d=-1 c)4b+3=3b-4//+4 4b+7=3b/-4b 7=-b b=-7 d)6e-2=7e+5/-7e -e-2=5/+2 -e=7 e=-7 e) chyba zle jest napisane f)6f-1=f+2/-f 5f-1=2/+1 5f=3/:5 f=trzy piate =0,6
