a, 12x+156=144
<=>12x =144-156
<=>12x =-12
<=>x =-12:12
<=>x =-1
a) 12x + 156 = 144
<=> 12x = 144 - 156
<=> 12x = -12
<=> x = -12:12 = -1
b) -4x + 6 = -12
-4x = -12 - 6
-4x = -18
x = -18:(-4) = 9/2
c) 0x = 4x - 12
0 = 4x - 12
4x = 12
x = 12:4
x = 3
12x +156=144
12x = 144 - 156
12x = -12
x = (-12) : 2
x = -6
Vậy x = -6.
-4x+6= -12
-4x = -12 - 6
-4x = -18
x = (-18) : (-4)
x = 4,5
Vậy x = 4,5
0x =4x -12
0 = 4x - 12
4x = 0 + 12
4x = 12
x = 12 : 4
x = 3.
Vậy x = 3
# HOK TỐT #
a,12x+156=144
<=>12x=-12
<=>x=-1
Vậy x=-1
b,-4x+6=-12
<=>-4x=-18
<=>x=9/2
Vậy x=9/2
c,0x=4x-12
<=>4x=12
<=>x=3
Vậy x=3
a) 12x+156=144
12x=144-156
12x=-12
x=-12:12
x=-1
b) -4x+6=-12
x+6=-12+4
x+6=-16
x=-16-6
x=-22
a ) \(12x+156=144\)
\(\Leftrightarrow12x=144-156\)
\(\Leftrightarrow12x=-12\)
\(\Leftrightarrow x=-12\div12\)
\(\Leftrightarrow x=-1\)
b ) \(-4x+6=-12\)
\(\Leftrightarrow-4x=\left(-12\right)-6\)
\(\Leftrightarrow-4x=-18\)
\(\Leftrightarrow x=-18\div\left(-4\right)\)
\(\Leftrightarrow x=\frac{9}{2}\)
c ) \(0x=4x-12\)
\(\Leftrightarrow0=4x-12\)
\(\Leftrightarrow4x=12\)
\(\Leftrightarrow x=12\div4\)
\(\Leftrightarrow x=3\)