x + 5x6 = 7+5 x +40=90
x + 30 =12 x =90-40
x = 12-30 x =50
x = -28
k mik nha
x + 5 x 6 = 7 + 5
x + 30 = 12
x = 12 - 30
x = -18
x + 40 = 90
x = 90 - 40
x = 50
x + 5 . 6 = 7 + 5
x + 5 . 6 = 12
x + 5 = 12 : 6
x + 5 = 2
x = 2 - 5
x = -3
x + 40 = 90
x = 90 - 40
x = 50
x+5*6=7+5
=>x+30=12
=>x=-18
x+40=90
=> x=90-40
=> x=50
a) x + 5 × 6 = 7 + 5
x + 30 = 12
x = 12 - 30
x = -18 ( Sai đầu bài )
b) x + 40 = 90
x = 90 - 40
x = 50
x + 5 x 6 = 7 + 5
x + 5 x 6 = 12
x + 30 = 12
x = 12 - 30
x = -18
x + 40 = 90
x= -18
x=50
tk cho mk nha cảm ơn các bạn nhiều
x+5x6=7+5
x+30=12
x =12-30
x =-18
x+40=90
x =90-40
x =50
A) x + 30= 12
x = 12 - 30
x = -18
B) x = 90 - 40
x = 50
k cho minh nha
\(x+5x6=7 +5\)
\(x+30=12\)
\(x=12-30\)
\(x=-18\)
\(x+40=90\)
\(x=90-40\)