Question

4. Dacă (AB)/(CD) = 4/3 atunci AB-CD/CD =

VA ROG REPEDE!!​

Answer 1

$\frac{AB}{CD}=\frac{4}{3}\\=>3AB=4CD=> AB=\frac{4CD}{3} \\\frac{\frac{4CD}{3}-CD }{CD}\\\frac{\frac{4CD-3CD}{3}}{CD}\\\frac{\frac{CD}{3} }{CD}\\=3=> \frac{AB-CD}{CD}=3$

Explicare:

Pentru inceput,d in raportul dat, am scos ca "3AB=4CD" de unde a rezultat ca "AB=4CD/3", in continuare am scris in ceea ce se cere[(AB-CD)/CD] pe AB ,in functie de CD(l-am obtinut mai sus), am facut scaderea si impartirea ( Rasturnat fractia).