Can someone explain to me how to solve these ?

Mathematics

1 answer:

boyakko [2]3 years ago

8 0

$\bf 21)\\\\
\cfrac{c}{a}=r+d\implies \cfrac{c}{r+d}=a
\\\\\\
23)\\\\
ka=v+w\implies a=\cfrac{v+w}{k}
\\\\\\
25)\\\\
z=y+mx\implies z-y=mx\implies \cfrac{z-y}{m}=x$

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