Question

Jika X=Y,D-E=X,dan D=-15 maka X+(E+D+Y-X) adalah

Answer 1

D-E =X
(-15) -Y =X
(-15) - Y = Y
(-15) =2Y
Y = -7.5 =X

D-E =X
(-15) -E =-7.5
E= 7.5

X+(E+D+Y-X)
-7.5 + (7.5 + (-15) + (-7.5) - (-7.5) = -7.5 + (-7.5) = -15