Toán Lớp 6: Bài 1 : Tìm x
a , ( 4x – 3 ) : ( -2 ) = -7
b , x – ( – 6 ) = 8 + ( -2 )
c, 30 – ( – x ) = 11
d , ( -2^2 ) . ( x – 3 ) = 12
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Toán Lớp 6: Bài 1 : Tìm x
a , ( 4x – 3 ) : ( -2 ) = -7
b , x – ( – 6 ) = 8 + ( -2 )
c, 30 – ( – x ) = 11
d , ( -2^2 ) . ( x – 3 ) = 12
Comments ( 1 )
Giải đáp:
\(\begin{array}{l}
a)x = \dfrac{{17}}{4}\\
b)x = 0\\
c)x = – 19\\
d)x = 0
\end{array}\)
Lời giải và giải thích chi tiết:
\(\begin{array}{l}
a)\left( {4x – 3} \right):\left( { – 2} \right) = – 7\\
\to 4x – 3 = 14\\
\to 4x = 17\\
\to x = \dfrac{{17}}{4}\\
b)x – \left( { – 6} \right) = 8 – 2\\
\to x + 6 = 6\\
\to x = 0\\
c)30 – \left( { – x} \right) = 11\\
\to 30 + x = 11\\
\to x = – 19\\
d)\left( { – {2^2}} \right).\left( {x – 3} \right) = 12\\
\to – 4\left( {x – 3} \right) = 12\\
\to x – 3 = – 3\\
\to x = 0
\end{array}\)