bài 1 tìm xa,71-(33+x)=26 d, 140: (x -8) =7 h, 2(x-51) =2.23 + 20e, 4(x+41) =400 e, 4(x + 41 ) = 400 i, 450: (x - 19) =50b,(x+73)-26=76 f, 3x=9 j, 4(x-3)=72 - 110c,45-(x+9) = 6 g, 4x = 64 k, 9x-1 =...
Đọc tiếp
bài 1 tìm x
a,71-(33+x)=26 d, 140: (x -8) =7 h, 2(x-51) =2.23 + 20
e, 4(x+41) =400 e, 4(x + 41 ) = 400 i, 450: (x - 19) =50
b,(x+73)-26=76 f, 3x=9 j, 4(x-3)=72 - 110
c,45-(x+9) = 6 g, 4x = 64 k, 9x-1 = 81
gái xính thế
\(a.33+x=45\)
\(x=12\)
\(d.x-8=20\)
\(x=28\)
\(h.2\left(x-51\right)=2^4+20\)
\(2\left(x-51\right)=16+20\)
\(2\left(x-51\right)=36\)
\(x-51=18\)
\(x=69\)
\(e.x+41=100\)
\(x=59\)
\(i.x-19=9\)
\(x=28\)
\(b.x+73=102\)
\(x=29\)
\(f.3^x=3^2\)
\(\Rightarrow x=2\)
\(j.4\left(x-3\right)=49-1\)
\(4\left(x-3\right)=48\)
\(x-3=12\)
\(x=15\)
\(c.x+9=39\)
\(x=30\)
\(g.4^x=4^3\)
\(\Rightarrow x=3\)
\(k.9^{x-1}=81\)
\(9^{x-1}=9^2\)
\(\Rightarrow x-1=2\)
\(x=3\)