Question

Tìm số tụ nhiên y:

2y + 5y = 50 - 220 :10

y = ?

Giúp vs

Answer 1

\(2y+5y=50-220:10\)

\(\Rightarrow7y=50-22\)

\(\Rightarrow7y=28\Rightarrow y=4\)

Answer 2

\(2y+5y=50-220:10\)

\(\Leftrightarrow7y=28\)

hay y=4

Answer 3

2y+5y=50-22

2y+5y=28

y+(2+5)=28

y+7=28

y=28-7

y=21