1. 53+a-77=14 | +77
53+a=91
a=91-53
a=38
2. x+39-62=9 | +62
x+39=71
x=71-39
x=32
3. 38+38-x=58
76-x=58
x=76-58
x=18
4. 95-62+m=80
33+m=80
m=80-33
m=47
5. 800-a+49-567+309-570=20 |+570
800-a+49-567+309=590 |-309
800-a+49-567=281 |+567
800-a+49=848 |-49
800-a=799
a=800-799
a=1
6. a+183-167+601-478=222 |+478
a+183-167+601=700 |-601
a+183-167=99 |+167
a+183=266
a=266-183
a=83
7. 77×a+534+300×5+72=77×a+534+1500+72=2337 |-72
77×a+534+1500=2265 |-1500
77×a+534=765 |-534
77×a=231
a=231÷77
a=3
Sper ca te-am ajutat. Am scris cat de explicit am putut. Dai coroana, te rog?
