\(49-x+12=30\)
\(49-x=30-12\)
\(49-x=18\)
\(x=49-18\)
\(x=31\)
Vậy \(x=31\)
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)=18\)
\(x+1+x+2+x+3=18\)
\(x+x+x+1+2+3=18\)
\(3x+6=18\)
\(x=18-6\)
\(3x=12\)
\(x=12:3\)
\(x=4\)
Vậy \(x=4\)
49-x=30-12=18
49-18=x
31=x=> x=31
3x+6=18
3x=18-6
3x=12
x=4
49 - x + 12 = 30
49 - x = 30 - 12
49 - x = 18
x = 49 - 18
x = 31
(x + 1) + (x + 2) + (x + 3) = 18
(x + x + x) + (1 + 2 + 3) = 18
3x + 6 = 18
3x = 12
x = 12 : 3
x = 4
\(49-x+12=30\)
\(49-x=30-12\)
\(49-x=18\)
\(x=49-18\)
\(x=31\)
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)=18\)
\(\left(x+x+x\right)+\left(1+2+3\right)=18\)
\(x\times3+6=18\)
\(x\times3=18-6\)
\(x\times3=12\)
\(x=12:3\)
\(x=4\)
Ủng hộ nha !
\(49-x+12=30\)
\(61-x=30\Leftrightarrow x=31\)
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)=18\)
\(x+1+x+2+x+3=18\Leftrightarrow3x+6=18\Leftrightarrow3x=12\Leftrightarrow x=4\)