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ex 6 va rogggg repede!!!!pote dau coroana!!!

Ex 6 Va Rogggg Repedepote Dau Coroana class=

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[(y+540:6)×7-100]:4:5=30
[(y+90)×7-100]:4:5=30
[y+90)×7-100]:4=30×5=150
(y+90)×7-100=150×4=600
(y+90)×7=600+100=700
y+90=700:7=100
y=100-90=10
y=10