Question

URGENTE ATÉ MEIO DIA!! ME AJUDEM POR FAVOR
Resolva estes sistemas de equações usando o método da adição.

Answer 1

olá !!!

$a)\\3x-2y=10\\5x+2y=22\\\\3x=10\\5x=22\\soma\\8x=32\\x=32/8\\x=4\\\\a) 1)\\3x-2y=10\\12-2y=10\\-2y=10-12\\-2y=-2\\2y=2\\y=2/2\\y=2\\\\a)2)\\5x+2y=22\\16+2y=22\\2y=22-16\\2y=6\\y=6/2\\y=3$

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$b)\\-a+2b=7\\a=-9\\\\-a=7\\a=-9\\soma\\0a=-2\\nao \\tem \\resposta$

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$c)\\a+3b=5\\2a-3b=-8\\\\a=5\\2a=-8\\soma\\3a=-3\\a=-3/3\\a=-1\\\\c)1)\\a+3b=5\\-a+3b=5\\3b=5+1\\3b=6\\b=6/3\\b=2\\\\c)2)\\2a-3b=-8\\-2-3b=-8\\-3b=-8+2\\-3b=-6\\3b=6\\b=6/3\\b=2$

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$d)\\2a-b=-3\\6a+b=7\\\\2a=-3\\6a=7\\soma\\8a=4\\a=4/8\\a=0,5\\\\d)1)\\2a-b=-3\\1-b=-3\\-b=-3-1\\-b=-4\\b=4\\\\d)2)\\6a+b=7\\3+b=7\\b=7-3\\b=4$

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espero ter ajudado

att: jovem lendário