Toán Lớp 6: a.-(x+3)-6=12
b.8+(-x+11)=-27
c.20-(x+6)=10
d.(x+7)-30=-62
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Toán Lớp 6: a.-(x+3)-6=12
b.8+(-x+11)=-27
c.20-(x+6)=10
d.(x+7)-30=-62
Comments ( 1 )
a.x = – 21\\
b.x = 24\\
c.x = 4\\
d.x = – 39
\end{array}\)
a. – \left( {x + 3} \right) – 6 = 12\\
\to – x – 3 = 18\\
\to – x = 21\\
\to x = – 21\\
b.8 + \left( { – x + 11} \right) = – 27\\
\to 8 – x – 11 = – 27\\
\to – 3 – x = – 27\\
\to x = 24\\
c.20 – \left( {x + 6} \right) = 10\\
\to x + 6 = 10\\
\to x = 4\\
d.\left( {x + 7} \right) – 30 = – 62\\
\to x + 7 = – 32\\
\to x = – 39
\end{array}\)