Toán Lớp 6: 1. tìm x , y
a)(x-3 ).(2y+1) = 7 b) (2x+1 ) .(3y-2 ) = -55
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Toán Lớp 6: 1. tìm x , y
a)(x-3 ).(2y+1) = 7 b) (2x+1 ) .(3y-2 ) = -55
Comments ( 2 )
Cứ cho x – 3 = 1 => x= 4
2y + 1 = 7 => y = 3
Tiếp x – 3 = 7 => x = 10
2y + 1 = 1 => y = 0
x-3 = -1