“Bài 1 : Tìm `x ` , biết :
a ) 123 – 5 (`x ` + 4 ) = 38
b ) [( 6`x ` – 72 ) : 2 – 84 ] . 24 = 5688
c ) ( 3`x ` – `2^4 ` ) . `7^3 ` = 2 . `7^4 `
d ) ( 4`x ` – `1 )^3 ` = `27^2 `
e ) 720 : [ 45 – ( 5 – 2`x `)^3 ] = `2^3 ` . 5
f ) 2022 + 2 ( `x ` – 1 ) = 2024
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