\(21,5\times4-y=70\)
\(86-y=70\)
\(y=86-70\)
\(y=16\)
21,5x4-y=70
=> 86x4-y=70
=> 344-y=70
=> y=344-70
=> y=274
vậy y=274
Knha
21, 5 x 4 - y = 70
86 - y = 70
y = 86 - 70
y = 16
Vậy x = 16
Nhớ bấm đúng cho mk nha!
21,5x4-y=70
=> 86-y=70
=>y=86-70
=> y=16
vậy y=16