a) \(11\times\left(x-6\right)=x\times4+11\)
\(11\times x-66=x\times4+11\)
\(\Rightarrow11\times x-x\times4=11+66\)
\(x\times\left(11-4\right)=77\)
\(x\times7=77\)
\(x=77:7\)
\(x=11\)
b) \(12:x+4=3+25:5\)
\(12:x+4=3+5\)
\(12:x+4=8\)
\(12:x=8-4\)
\(12:x=4\)
\(x=12:4\)
\(x=3\)
11 x x - 66 = x x 4 + 11
11 x x - x x 4 = 66 + 11
x x 7 = 77
x = 77 : 7
x = 11
12 : x + 4 = 3 + 5
12 : x + 4 = 8
12 : x = 8 - 4
12 : x = 4
x = 12 : 4
x =3
a ) 11 x (x - 6) = x x 4 + 11 b ) 12 : x + 4 = 3 + 25 : 5
11 x x - 66 = x x 4 + 11 12 : x + 4 = 3 + 5
11 x x - x x 4 = 11 + 66 12 : x + 4= 8
x x ( 11 - 4 ) = 77 12 : x = 8 - 4
x x 7 = 77 12 : x = 4
x = 77 : 7 x = 12 : 4
x =11 x = 3