Question

alfa nr necunoscute din fiecare expresie dupa ex oferit.720:a+450:3=240.720:a +150=240 720:a =240-150 720:a=90. a =720:90 a=8 ......20×e-(1950+550):100=6175.......?.?35×f+(800-752:4):2=551?????g:25+(100-1632:51)×2=286........244-h×5+(300-6×16):4=255

Answer 1

20×e-(1 950+550):100=6 175
20×e-2500:100=6 175
20×e-25=6 175
20×e=6 175+25=6 200
20×e=6 200
e=6 200:20
e=310

35×f+(800-752:4):2=551
35×f+(800-188):2=551
35×f+612:2=551
35×f+306=551
35×f=551-306
35×f=245
f=245:35
f=7

g:25+(100-1 632:51)×2=286
g:25+(100-32)×2=286
g:25+68×2=286
g:25+136=286
g:25=286-136
g:25=150
g=150×25
g=3750

244-h×5+(300-6×16):4=255
244-h×5+(300-96):4=255
244-h×5+204:4=255
244-h×5+51=255
244-h×5=255-51
244-h×5=204
h×5=244-204
h×5=40
h=40:5
h=8