<img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B7%7Dd%3D%20-3" id="TexFormula1" title="\frac{1}{7}d= -3" alt="\frac{1}{7}d= -

4 years ago

3" align="absmiddle" class="latex-formula">

1 answer:

6 0

D = -21

multiply both sides by 7
1/7d (7) = -3 (7)

reduce with greatest common factor
d = 7(-3)

change signs
d = -7(3)

solve
d=-21

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