2 câu trả lời
a./ x-15=53
x=53+15
x=68
b./43-x=23
x=43-23
x=20
c./ 23+x=56
x=56-23
x=33
a) x - 15 = 53
=> x = 53 + 15
=> x = 68
b) 43 - x = 23
=> x = 43 - 23
=> x = 20
c) 23 + x = 56
=> x = 56 - 23
=> x = 33
a./ x-15=53
x=53+15
x=68
b./43-x=23
x=43-23
x=20
c./ 23+x=56
x=56-23
x=33
a) x - 15 = 53
=> x = 53 + 15
=> x = 68
b) 43 - x = 23
=> x = 43 - 23
=> x = 20
c) 23 + x = 56
=> x = 56 - 23
=> x = 33
