Question

Aflati termenul necunoscut prin metoda mersului invers:
a) m-37+12=29
68-m+53=72
m-24+15=43
m-44+15=42

b) 90-b+13=27
b-17+29=72
56-m+23=40
65-m+19=28


c) (44+a)-17=50
(70-y)-25=25
(49-d)+11=37
(76+u)-68=32

d)845-232+a=889
938-405+c=648
875-b+173=694
563-n+200=419

URGENT!! DAU COROANA SI 15 PUNCTE

Answer 1

a)m-37+12=29
m-37=29-12=17
m-37=17
m=17+37
m=54

68-m+53=72
68-m=72-53=19
m=68-19
m=49


m-24+15=43
m-24=43-15=28
m=28+24
m=52

m-44+15=42
m-44=42-15=27
m=27+44
m=71

b)90-b+13=27
90-b=27-13=14
b=90-14
b=76

b-17+29=72
b-17=72-29=43
b=43+17
b=60


56-m+23=40
56-m=40-23=17
m=56-17
m=39

65-m+19=28
65-m=28-19=9
m=65-9
m=65

c)(44+a)-17=50
44+a=50+17=67
a=67-44
a=23

(70-y)-25=25
70-y=25+25=50
y=70-50
y=20

(49-d)+11=37
49-d=37-11=26
d=49-26
d=23

(76+u)-68=32
76+u=32+68=100
u=100-76
u=24

d)845-232+a=889
613+a=889
a=889-613
a=276


938-405+c=648
533+c=648
c=648-533
c=115

875-b+173=694
b+173=875-694=181
b=181+173
b=354

563-n+200=419
n+200=563-419=144
n=144+200
n=344
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