`4.(7x-3)=4^3+2^3`
`⇔4.(7x-3)= 64 + 8`
`⇔4.(7x-3)=72`
`⇔7x -3 = 72 : 4`
`⇔7x - 3 = 18`
`⇔7x = 18 + 3`
`⇔7x =21`
`⇔x = 21 : 7`
`⇒x =3`
`- - - -- - - - - - -- - - - - - -`
`(24+5)|x-1|.7^3=7^5`
`⇔29|x-1|.7^3=7^5`
`⇔29|x-1| = 7^5 : 7^3`
`⇔29|x-1| = 7^2`
`⇔29|x-1| = 49`
`⇔|x - 1| = 49 : 29`
`⇔|x - 1| = 49/29`
`⇔` \(\left[ \begin{array}{l}x -1 =\frac{49}{29}\\x-1 =\frac{-49}{29} \end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=\frac{78}{29}\\x=\frac{-20}{29}\end{array} \right.\)
