The best plan for that particular equation would be to first subtract 15 from each side, and then apply the quadratic formula.
-86
5b = 21 + 4b 5b - 4b = 21 + 4b - 4b b = 21
2a-6a-a=b+4b-4b -5a=5b-4b -5a=1b a=-5 b=1
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
4b - 1 = -4 + 4b + 3first, simplify and add together what you can.4b - 1 = -1 + 4b4b = 4bbecause 4b is always equal to 4b, the answer is infinite.
The best plan for that particular equation would be to first subtract 15 from each side, and then apply the quadratic formula.
4b+3=15 4b=15-3 b=(15-3)/4 b=3
-86
identity.
It is the same as: 4b+665
5b = 21 + 4b 5b - 4b = 21 + 4b - 4b b = 21
2a-6a-a=b+4b-4b -5a=5b-4b -5a=1b a=-5 b=1
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
4b
-4b+2 = 18 -4b = 18-2 -4b = 16 b = -4
36 -20 = 16