Example

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

Question

$$(-7)-8-(-25); (-13)+32-8-1; (-7)+(-8)+(-90); 50-(-40)-(-2)$$

Answer

-7-8+25;-13+32-8-1;-7-8-90;50+40+2

Solution


Remove parentheses.
\[\begin{aligned}&-7-8+25\\&-13+32-8-1\\&-7-8-90\\&50+40+2\end{aligned}\]
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