y:8+yx8-56,78=69,11x2
y:8+yx8-56,78=138,22
y:8+yx8=138,22+56,78
y:8+yx8=195
chịu
CHÚC BẠN HỌC GIỎI
TK MÌNH NHÉ
y : 8 + y x 8 - 56.78 = 69.11 x 2
y : 8 + y x 8 - 56.78 = 138.22
y : 8 + y x 8 = 138.22 + 56.78
y : 8 + y x 8 = 195
y x 0.125 + y x 8 = 195
y x ( 0.125 + 8 ) = 195
y x 8.125 = 195
y = 195 : 8.125
y = 24