Question

a) Dacaa a×(b+5) = 336 si a×b =301,calculeazal pe a.

Answer 1

$a(b + 5) = 336$

$a \times b = 301$

$a = \frac{301}{b}$

$\frac{301}{b} (b + 5) = 336$

$301 + \frac{1505}{b} = 336 \: | \times b$

$301b + 1505 = 336b$

$301b - 336b = - 1505$

$- 35b = - 1505 \: | \div ( - 35)$

$b = 43$

$a = \frac{301}{b}$

$a = \frac{301}{43}$

$a = 7$