x + 30 = 60 + 40
x + 30 = 100
x = 100 - 30
x = 70
x + 30 = 60 + 40
x + 30 = 100
x = 100 - 30
x = 70
x+30=60+40
x+30=100
x=100-70
x=30
k mình nhé mình nhanh nhất
x + 30 = 60 + 40
x + 30 = 100
x = 100 - 30
x = 70
x - 30 = 60 + 40
x - 30 = 100
x = 100 + 30
x = 130
x+30=60+40
x+30=100
x=100-30
x=90
Tk chi mk nhoaaa
x+30=60+40
<=>x+30=100
=>x=100-30
=>x=70
x + 30 = 60 + 40
x + 30 = 100
x = 100 - 30
x = 70
\(x+30=60+40\)
\(x+30=100\)
\(x=100-30\)
\(x=70\)
Ta cÓ : x + 30 = 60 + 40 =) x + 30 = 100
=) x= 100 - 30 = 70