Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$l:(-2)-(-3)-(-10)-(-2),$$

Answer

15-l/2

Solution


Move the negative sign to the left.
\[-\frac{l}{2}-(-3)-(-10)-(-2)\]
Remove parentheses.
\[-\frac{l}{2}+3+10+2\]
Collect like terms.
\[-\frac{l}{2}+(3+10+2)\]
Simplify.
\[15-\frac{l}{2}\]
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