Toán Lớp 7: -3/2 – 2 . x + 3/4 = -2
( -3/2 .x – 3/5 ) . ( 3/-2 – 12/3 ) = 2/5
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Toán Lớp 7: -3/2 – 2 . x + 3/4 = -2
( -3/2 .x – 3/5 ) . ( 3/-2 – 12/3 ) = 2/5
Comments ( 2 )
=> – 2x = -2+3/2- 3/4
=> – 2x = -5/4
=> 2x = 5/4
=> x = 5/4 . 1/2
=> x = 5/8
=>( -3/2 x – 3/5 ) . -11/2 = 2/5
=> -3/2 x – 3/5 = 2/5: -11/2
=> -3/2 x – 3/5 = 2/5. -2/11
=> -3/2 x – 3/5 = -4/55
=> -3/2 x = -4/55+3/5
=> -3/2 x = 29/55
=> x = 29/55.-2/3
=> x = -58/165