200 - 8 . ( 2X + 7 ) = 112
8 . ( 2X + 7 ) = 200 - 112
8 . ( 2X + 7 ) = 88
2x + 7 = 88 : 8
2x + 7 = 11
2x = 11 - 7
2x = 4
x = 4 : 2
x = 2
200 - 8 x ( 2x + 7 ) ) = 112
8 x ( 2x + 7 ) = 200 - 112
8 x ( 2x + 7 ) = 88
( 2x + 7 ) = 88 : 8
( 2x + 7 ) = 11
2x = 11+ 7
2x = 18
x = 18 : 2
x = 9
vậy x = 9
200-8x (2x+7)=112
=>8x(2x+7)=200-112
=>8x(2x+7)=88
=>2x+7=88:8
=>2x+7=11
=>2x=8-7
=>2x=1
=>x=1:2
=>x=1/2
=>x=0,5
\(200-8\times\left(2x+7\right)=112\)
\(8\times\left(2x+7\right)=200-112\)
\(8\times\left(2x+7\right)=88\)
\(8\times2x+8\times7=88\)
\(16x+56=88\)
\(16x=88-56\)
\(16x=32\)
\(x=32\div16\)
\(x=2\)
TL:
200 - 8 . ( 2X + 7 ) = 112
8 . ( 2X + 7 ) = 200 - 112
8 . ( 2X + 7 ) = 88
2x + 7 = 88 : 8
2x + 7 = 11
2x = 11 - 7
2x = 4
x = 4 : 2
x = 2
HT