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Svetach [21]
4 years ago
8

Find r 3(r - 7 ) = 4(2 - 2r) + 4

Mathematics
1 answer:
stiks02 [169]4 years ago
8 0

\bf 3(r-7)=4(2-2r)+4\implies \stackrel{\textit{distributing}}{3r-21=8-8r+4}\implies 3r-21=12-8r \\\\\\ 11r-21=12\implies 11r=33\implies r=\cfrac{33}{11}\implies r=3

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