1278 + X x 8= 4878
X x 8 =4878 - 1278
X x 8=3600
X =3600: 8
X = 400
1278 + x * 8 = 4878
x * 8 = 4878 - 1278
x * 8 = 3600
x = 3600 : 8
x = 450
1278 + x . 8 = 4878
x . 8 = 4878 - 1278
x . 8 = 3600
x = 3600 : 8
x = 450
1278 + x * 8 = 4878
x* 8 = 4878 - 1278
x * 8 = 3600
x = 3600 : 8
x = 450
Vậy x = 450
1278+x*8=4878
x*8=4878-1278
x*8=3600
x=3600:8
x=450
k mk nha chúc bn hok tốt
1278+x×8=4878
x×8=4878-1278
x×8=3600
x=3600:8
x=400
Mk nhầm nha lm lại
1278+x×8=4878
x×8=4878-1278
X×8=3600
X=3600:8
X=450
Vậy x=450
1278 + x*8 = 4878
\(\Leftrightarrow\) x*8 = 4878 - 1278
\(\Rightarrow\)x*8 = 3600
\(\Rightarrow\)x = 3600 : 8
\(\Rightarrow\)x = 450
1278+x*8=4878
x*8=4878-1278
x*8=3600
x=3600/8
x=450
vậy x=450
1278 + x . 8 = 4878
x . 8 = 4878 - 1278
x . 8 = 3600
x = 3600 : 8
x = 450
1278+x*8=4878
=> x*8=4878-1278
=>x*8=3600
=>x=3600:8
=>x=450
Vậy x=450
1278+x.8=4878
x.8=4878-1278
x.8=3600
x=3600/8
x=450
1278 + 8x = 4878
=> 8x = 4878 - 1278
=> 8x = 3600
=> x = 3600 : 8
=> x = 450
Vậy x = 450
1278+x*8=4878
\(\Rightarrow\)x*8 =4878-1278
\(\Rightarrow\)x*8=3600
\(\Rightarrow\)x =3600:8
\(\Rightarrow\)x =450