Toán Lớp 6: Tìm số nguyên x, biết:
A.$(35+x)$-12=27$
B.$36-x:2=16$
C.(2x+6).2= $4^{2}$ +8$
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Toán Lớp 6: Tìm số nguyên x, biết:
A.$(35+x)$-12=27$
B.$36-x:2=16$
C.(2x+6).2= $4^{2}$ +8$
Comments ( 2 )
a)\left( {35 + x} \right) – 12 = 27\\
\Leftrightarrow 35 + x = 39\\
\Leftrightarrow x = 4\\
b)36 – x:2 = 16\\
\Leftrightarrow x:2 = 20\\
\Leftrightarrow x = 40\\
c)\left( {2x + 6} \right).2 = {4^2} + 8\\
\Leftrightarrow \left( {2x + 6} \right).2 = 24\\
\Leftrightarrow 2x + 6 = 12\\
\Leftrightarrow 2x = 6\\
\Leftrightarrow x = 3
\end{array}\]