Question

17754:[(15×a-35):4-27:3]=87

Answer 1

Răspuns:

$17754:[(15a-35):4-27:3]=87 <=>$

$<=> 17754:(\frac{15a-35}{4}-^{4)} 9 )=87 <=>$

$<=> 17754: \frac{15a-35-36}{4} =87 <=>$

$<=> 17754*\frac{4}{15a-71} =87 <=>$

$<=> \frac{4}{15a-71} =\frac{87}{17754} <=>$

$<=> \frac{4}{15a-71} =\frac{29}{5918} <=>$

$<=> (15a-71)*29=4*5918 <=>$

$<=> 435a-2059=23672 <=>$

$<=> 435a=23672+2059<=>$

$<=> 435a=25731 => a=\frac{25731}{435} =\frac{8577}{145} =>$ a≈59,15