Ta có : x - 23 = 45
=> x = 45 + 23
=> x = 68
x + 23 = 45
=> x = 45 - 23
=> x = 22
x - 23 = 45
x = 45 + 23
x = 68
x + 23 = 45
x = 45 - 23
x = 22
x - 23 = 45
x = 45+ 23
x = 68
x + 23 = 45
x = 45 - 23
x = 22
X-23=45
X =45+23
X =68
X+23=45
X =45-23
X =22
a)x-23=45.
x=45+23.
x=68.
b)x+23=45.
x=45-23.
x=22.
Vậy ......
Tìm X :
X - 23 = 45
X = 45 + 23
X = 68
X + 23 = 45
X = 45 - 23
X = 22
x - 23 = 45
x = 45 + 23
x = 68
x + 23 = 45
x = 45 - 23
x = 22
x - 23 = 45
x = 45 + 23
x = 68
x + 23 = 45
x = 45 - 23
x = 22
x-23=45
x=45+23
x= 68
x+23=45
x=45-23
x=22
x - 23 = 45
x = 45+ 23
x = 68
x + 23 = 45
x = 45 - 23
x = 22
x - 23 = 45
x = 45 + 23
x = 68
x + 23 = 45
x = 45 - 23
x = 22
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Thân!