Question

[Hoài Thương]

3x(2x X + 1) - 2x (10-2 x X) - ( 5x X + 2)= 10-X

Answer 1

[Lê Hiền Nam]

\(3\cdot\left(2\cdot x+1\right)-2\cdot\left(10-2\cdot x\right)-\left(5\cdot x+2\right)=10-x\)

\(\Rightarrow6\cdot x+3-20+4\cdot x-5\cdot x+2=10-x\)

\(\Rightarrow6\cdot x+3-20+4\cdot x-5\cdot x+2+x=10\)

\(\Rightarrow\left(6\cdot x+4\cdot x-5\cdot x+x\right)+3-20+2=10\)

\(\Rightarrow6\cdot x=10-3+20+2\) \(\Rightarrow6\cdot x=29\) \(\Rightarrow x=\frac{29}{6}\)