Question

afla pe y din egalitatea: [(y+450:6)×7-100]:4:5=30​

Answer 1

[(y+540:6)×7-100]:4:5=30

[(y+90)×7-100]:4=30×5

[(y+90)×7-100]4=150

(y+90)×7-100=150×4

(y+90)×7-100=600

(y+90)×7=600+100

(y+90)×7=700

y+90=700:7

y+90=100

y=100-90

y=10

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