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determina valoarea lui a din:

(324 : 6 + 345 : 5) * 2 + 1237 = 43 * a + 1354


Răspuns :

(54+69)•2+1237=43•a+1354=123•2+1237=43•a+1354=246+1237=43•a+1354=1283=43•a+1354=43•a=1354-1283=43•a=71=a=71supra43
<=>(54+69)*2+1237=43a+1354
<=>135*2+1237=43a+1354
<=>230+1237=43a+1354
<=>1507=43a+1354
<=>1507-1354=43a
<=>153=43a=>a=3.55