Toán Lớp 6: A) 7-x=21+(-37)
B) 12-(5+x) =27
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Toán Lớp 6: A) 7-x=21+(-37)
B) 12-(5+x) =27
Comments ( 2 )
a,
7-x=21+(-37)
->7-x=-16
->x=7-(-16)
->x=7+16
->x=23
Vậy x=23
b,
12-(5+x)=27
->5+x=12-27
->5+x=-15
->x=(-15)-5
->x=-20
Vậy x=-20
a) 7 – x = 21 + ( -37 )
7 – x = -16
x = 7 – – 16
x = 23
b) 12 – ( 5 + x ) = 27
5 + x = 12 – 27
5 + x = -15
x = -15 – 5
x = -20