Answer: Michael is 33 years old.
Step-by-step explantation: Okay, think of it like this, Michael's age for right now is x since we still do not know Michael's age. Pay close attention to the first sentence. What does it say? m = b + 2. Now pay attention to the second sentence. What does it say? m - 17 = 4 ⋅ (b = 17). Now, let's move on to the system of equations. As you can see here, the system of equations is
{m = b + 12
{m - 17 = 4 ⋅ (b - 17}.
Now for more equations.
m - 17 = 4b - 68
m = 4b - 68 + 17
m = 4b - 51
m - 4b = -51
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b + 12 - 4b = -51, through the substitution from the first equation we saw
-3b = -51 - 12
3b = 51 + 12
b = 51/3 + 12/3
b = 17 + 4
b = 21
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m = 33.
