Toán Lớp 6: Tìm y:
a) 100 – 7 x (y – 5) = 65
b) (2y – 5) + 17 = 6
c) y x (2 + y) x (49 – y²) = 0
d) 10 – 3y xx (4 – 3) = -2
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Toán Lớp 6: Tìm y:
a) 100 – 7 x (y – 5) = 65
b) (2y – 5) + 17 = 6
c) y x (2 + y) x (49 – y²) = 0
d) 10 – 3y xx (4 – 3) = -2
Comments ( 1 )
Giải đáp:
Lời giải và giải thích chi tiết:
a,100-7.(y-5)=65
7.(y-5)=100-35
7.(y-5)=35
y-5=35:7
y-5=5
y=5+5
y=10
b)(2y-5)+17=6
2y-5=6-17
=>2y-5= -11
=>2y= -6
=> y= -3