Question

sabendo que m+n=24 e m-n= 10,calcule o valor da expressão a seguir

Answer 1

Resposta:

$\left \{ {{m+n=24} \atop {m-n=10}} \right. \\\\\left \{ {{m=24-n} \atop {24-n-n=10}} \right. \\\\\left \{ {{m=24-n} \atop {-2n=10-24}} \right. \\\\\left \{ {{m=24-n} \atop {-2n=-14}} \right. \\\\\left \{ {{m=24-n} \atop {2n=14}} \right. \\\\\left \{ {{m=24-n} \atop {n=\frac{14}{2} }} \right. \\\\\left \{ {{m=24-7} \atop {n=7}} \right. \\\\\left \{ {{m=17} \atop {n=7}} \right.$

m+n = 24

17 + 7 = 24

24 = 24

m-n = 10

17 - 7 = 10

10 = 10

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