\(3-x=12\)
\(x=3-12\)
\(x=-9\)
\(\left|-10\right|+x=\left|-14\right|\)
\(10+x=14\)
\(x=14-10\)
\(x=4\)
\(21+x=\left|-11\right|\)
\(21+x=11\)
\(x=11-21\)
\(x=-10\)
\(x-\left|-43\right|=15\)
\(x-43=15\)
\(x=15+43\)
\(x=58\)
\(x+\left|-70\right|=-43\)
\(x+70=-43\)
\(x=-43-70\)
\(x=-113\)
Ủng hộ mk nha
1) 3 - x = 12
=> x = 3 - 12 = 3 + ( -12 )
=> x = - ( 12- 3 ) = -9
2) (-10) + x = (-14)
=> x = (-14) - (-10) => x = (-14) +10 = -4
3) 21 + x = [-11]
=> x = [-11] - 21 = - ( 11 +21 )
=> x = -32
4) x - [ - 43 ] = 15
=> x = 15 + [ - 43 ] => x = -(43 - 15 )
=> x = -23
5) x + [-70 ] = -43
=> x = -43 + [-70] => x = -[43 + 70 ]
=> x = -113
tích cho mk nhen !!!
5) x + (-70) = -43
=> x = -43 - ( -70 ) = -43 + 70
=> x = 70 - 43 = 27 . Xin lỗi mình làm nhầm !!