![\bf 3x+378+48x=21\implies 51x+378=21\implies 51x=-357 \\\\\\ x=\cfrac{-357}{51}\implies \blacktriangleright x=-7 \blacktriangleleft \\\\\\ \stackrel{\textit{since we know that}}{y=63+8x\implies }y=63+8(-7)\implies y=63-56\implies \blacktriangleright y=7 \blacktriangleleft \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (-7,7)~\hfill](/tpl/images/0082/9678/1a9ac.png)
Solve by substitution. 3x+6y=21 -8x+y=63
what is the solution?...
Mathematics, 13.07.2019 01:10 carlosatniel47
Solve by substitution. 3x+6y=21 -8x+y=63
what is the solution?
Answers: 1
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