Question

80 - 12x = 4 . 5 mũ 2 - 3 nhân . 2 mũ 3

tìm x nhé 

Answer 1

80-12x=76

-->12x=80-76

-->12x=4

-->x=4:12

-->x=4/12

-->x=1/3

k nha

Answer 2

\(80-12x=4.5^2-4.2^3\)

\(\Leftrightarrow80-12x=4.\left(5^2-2^3\right)\)

\(\Leftrightarrow80-12x=4.\left(25-8\right)\)

\(\Leftrightarrow80-12x=4.17\)

\(\Leftrightarrow80-12x=68\)

\(\Leftrightarrow12x=12\)

\(\Leftrightarrow x=1\)