Answer:
<em>2+4r. Expressions are equivalent.</em>
Step-by-step explanation:
<em>
Multiply r and 3
</em>
<em>Multiply r and 1
</em>
<em>
The r just gets copied along.
</em>
<em>
The answer is r
</em>
<em>
r
</em>
<em>
3*r evaluates to 3r
</em>
<em>
3*r+10 evaluates to 3r+10
</em>
<em>
3r + r = 4r
</em>
<em>
The answer is 4r+10
</em>
<em>
3*r+10+r evaluates to 4r+10
</em>
<em>
10 - 8 = 2
</em>
<em>
The answer is 2+4r
</em>
<em>
3*r+10+r-8 evaluates to 2+4r
</em>
<em>
The final answer is
</em>
<em>2+4r</em>
<em />
<em>
Multiply r and 2
</em>
<em>Multiply r and 1
</em>
<em>
The r just gets copied along.
</em>
<em>
The answer is r
</em>
<em>
r
</em>
<em>
2*r evaluates to 2r
</em>
<em>
Multiply 2 and 2r
</em>
<em>
Multiply 1 and r
</em>
<em>
The r just gets copied along.
</em>
<em>
r
</em>
<em>
2*(2*r) evaluates to 4r
</em>
<em>
8+2*(2*r) evaluates to 8+4r
</em>
<em>
8 - 6 = 2
</em>
<em>
The answer is 2+4r
</em>
<em>
8+2*(2*r)-6 evaluates to 2+4r
</em>
<em>
The final answer is
</em>
<em>2+4r</em>
