Răspuns :
(410-x):7=120 -70
(410-x):7=50
410-x=50x7
410-x=350
x=410-350
x=60
(410-x):7=50
410-x=50x7
410-x=350
x=410-350
x=60
(410-x):7=120-70
(410-x):7=50
410-x=50X7
410-x=350
x=410-350
x=60
(410-x):7=50
410-x=50X7
410-x=350
x=410-350
x=60