-4b+2 = 18 -4b = 18-2 -4b = 16 b = -4
9b-13b= -4b -4b = 40 Divide both sides by -4 b = -10
4b-b
5b = 8 therefore b = 8/5 therefore b = 1.6
6 + 12 - 5 = 13
36 -20 = 16
2a-6a-a=b+4b-4b -5a=5b-4b -5a=1b a=-5 b=1
5b = 21 + 4b 5b - 4b = 21 + 4b - 4b b = 21
-4b+2 = 18 -4b = 18-2 -4b = 16 b = -4
-7+3b = 4b-8 3b-4b = -8+7 -b = -1 b = 1
2
4b+3=15 4b=15-3 b=(15-3)/4 b=3
there is a sign missing -- if 4b +15 = 7b then 3b = 15 and b thus = 5 if 4b - 15 = 7b then 3b = -15 and b = -5
-3b=96+b -4b=96 b=-24
320 tolerance +/- 20 ? Did I get it right?
5b = 8 b = 8/5 or 1.6
-86