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信息发布者:
解:
​$\begin {aligned}6x + 6 &= 306 \\6x &= 306 - 6 \\6x &= 300 \\x &= 50\end {aligned}$​
解:
​$\begin {aligned}x - 0.1x &= 1.08 \\0.9x &= 1.08 \\x &= 1.2\end {aligned}$​
解:
​$\begin {aligned} 2x - 3.5 + 4.5 &= 12 \\2x + 1 &= 12 \\2x &= 11 \\x &= 5.5\end {aligned}$​
解:
​$\begin {aligned} 0.3x + 1.2×3 &= 10.5 \\0.3x + 3.6 &= 10.5 \\0.3x &= 10.5 - 3.6 \\0.3x &= 6.9 \\x &= 23\end {aligned}$​
解:
​$\begin {aligned} 4.8x \div 0.5 &= 7.2 \\4.8x &= 7.2×0.5 \\4.8x &= 3.6 \\x &= 0.75\end {aligned}$​
解:
​$\begin {aligned}(x + 6)×0.25 &= 4 \\x + 6 &= 4 \div 0.25 \\x + 6 &= 16 \\x &= 10\end {aligned}$​
解:
​$\begin {aligned}18x &= 450 \\x &= 25\end {aligned}$​
解:
​$\begin {aligned} 3x + 450 &= 1050 \\3x &= 1050 - 450 \\3x &= 600 \\x &= 200\end {aligned}$​
解:
​$\begin {aligned}25×4 + 5x &= 150 \\100 + 5x &= 150 \\5x &= 150 - 100 \\5x &= 50 \\x &= 10\end {aligned}$​
解:
​$\begin {aligned} 4x + 3x &= 420 \\7x &= 420 \\x &= 60\end {aligned}$​