Question

VĂ ROG E URGENT DAU CORONIȚĂ:(​

Answer 1

{a,b} d.p {3,4}

2a+3b=54

{a,b} d.p {3,4} <=>

$\frac{a}{3 } = \frac{b}{4} = k$

k=coeficient de proportionalitate

$\frac{a}{3} = k = > a = 3k$

$\frac{b}{4} = k = > b = 4k$

2a+3b=54

2×3k+3×4k=54

6k+12k=54

18k=54

k=54÷18

k=3

a=3k=>a=3×3=9

b=4k=>b=4×3=12