Question

Determinati valoarea lui a din:
(324:6+345:5)•2+1237=43•a+1354.
VĂ ROOOOOG,AJUTATI-MĂ URGENT!

Answer 1

$(54+69)*2+1237=43a+1354$
$123*2+1237=43a+1354$
$246+1237=43a+1354$
$1483=43a+1354$
$43a=1482-1354$
$43a=129$
$a=129:43$
$a=3$

Answer 2

$\displaystyle (324:6+345:5)\cdot2+1237=43\cdot a+1354 \\ (54+69) \cdot 2+1237=43a+1354 \\ 123 \cdot 2+1237=43a+1354 \\ 246+1237=43a+1354 \\ -43a=1354-246-1237 \\ -43a=-129 \\ a= \frac{129}{43} \\ a=3$