Question

Bài 2: Tìm X:
a) X x 12 + X x 7+ X = 100                                       c) (X- 60720) : 5= 318 + 642
b) X x 4 + X x 3 = 7497 :7                                         d) X : 4 + 11250 = 22850  
Giải gấp cho em với ạ

Answer 1

\(a,\Leftrightarrow x\left(12+7+1\right)=100\)

\(\Leftrightarrow x.20=100\)

\(\Leftrightarrow x=50\)

\(b,\Leftrightarrow x\left(4+3\right)=1071\)

\(\Leftrightarrow7x=1071\)

\(\Leftrightarrow x=153\)

\(c,\Leftrightarrow x-60720=960\times5\)

\(\Leftrightarrow x-60720=4800\)

\(\Leftrightarrow x=4800+60720\)

\(\Leftrightarrow x=65520\)

\(d,\Leftrightarrow x:4=22850-11250\)

\(\Leftrightarrow x:4=11600\)

\(\Leftrightarrow x=46400\)