He used the distributive property incorrectly.
Option B is correct.
Step-by-step explanation:
We need to identify Jakob's error in subtracting the expressions
(6.7x-3)-(3.4x-1)-(2x-2)
In this step, we apply distributive property: a(b+d)=ab+bd
We will get:
6.7x-3-3.4x+1-2x+2
While Jakob got:
6.7x-3-3.4x-1-2x-2
He made error in multiplying (-) with (-1) -*-1=1 and (-) with (-2) -*-2=2 which is basically applying distributive property.
Now, solving:
=1.3x-3+3
=1.3x
So, He used the distributive property incorrectly.
Option B is correct.
Keywords: Solving Equations
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