Salut! ♡
Rezolvare ✍‼
b) 16x-13x+....+6x= 18 =>
=> -7x +6x= 18x =>
=> -x + ...= 18x => ...=18x - (-x) =>
=> ... =18x + x => ...= 19x
c) 10a+14a-......+12a=15a =>
=> 24a-... + 12a= 15a
=> 24a - ...= 15a - 12a =>
=> 24a -...= 3a =>
=> ...= 24a-3a =>
=> ...= 21a
d) 4x-5x²+......+18x²=0 =>
=> -x² + ... + 18x²= 0 =>
=> -x²+ ...= 0 - 18x² =>
=> -x² + ...= -18x² =>
=> ...= -18x² - (-x²) =>
=> ...= -18x² + x² =>
=> x= -17x²
e) 11xy-7xy+.....-8xy=21xy =>
=> 4xy + ...= 21xy + 8xy =>
=> 4xy+...= 29xy =>
=> ...= 29xy - 4xy =>
=> ....= 25xy
Succes!
Coroniță? ♡
