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Basic Math
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Example
3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b
Question
$$-20+18+21$$
Evaluate
$19$
Solution Steps
Add $-20$ and $18$ to get $-2$.
$$-2+21$$
Add $-2$ and $21$ to get $19$.
$$19$$
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Factor
$19$
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