Răspuns:
[tex]17754:[(15a-35):4-27:3]=87 <=>[/tex]
[tex]<=> 17754:(\frac{15a-35}{4}-^{4)} 9 )=87 <=>[/tex]
[tex]<=> 17754: \frac{15a-35-36}{4} =87 <=>[/tex]
[tex]<=> 17754*\frac{4}{15a-71} =87 <=>[/tex]
[tex]<=> \frac{4}{15a-71} =\frac{87}{17754} <=>[/tex]
[tex]<=> \frac{4}{15a-71} =\frac{29}{5918} <=>[/tex]
[tex]<=> (15a-71)*29=4*5918 <=>[/tex]
[tex]<=> 435a-2059=23672 <=>[/tex]
[tex]<=> 435a=23672+2059<=>[/tex]
[tex]<=> 435a=25731 => a=\frac{25731}{435} =\frac{8577}{145} =>[/tex] a≈59,15
