Question

halla el valor desconocido en cada ecuacion

A) m +5/7 -11/7 = 2/7
B) n + 6/13 + 5/13 = -6/13
C) y - 1/3 - 1/4 = 5/6
D) -5/7 + 1/3 + z = 1/3
E) 2 - 2/9 + y = -2

Answer 1

$m+\dfrac{5}{7}-\dfrac{11}{7}=\dfrac{2}{7}\\\\7m+5-11=2\\7m=2+6\\7m=8\\m=8/7\\\\\\\\n+\dfrac{6}{13}+\dfrac{5}{13}=-\dfrac{6}{13}\\\\13n+6+5=-6\\13n=-6-11\\13n=-17\\n=-17/13\\\\\\\\y-\dfrac{1}{3}-\dfrac{1}{4}=\dfrac{5}{6}\\\\12y-4-3=10\\12y=10+7\\12y=17\\y=17/12\\\\\\\\-\dfrac{5}{7}+\dfrac{1}{3}+z=\dfrac{1}{3}\\\\-15+9+z=9\\z=9+6\\z=15\\\\\\\\2-\dfrac{2}{9}+y=-2\\\\18-2+9y=-18\\9y=-18-16\\9y=-34\\y=-34/9$