a)\(720:\left(x-17\right)=12\)
\(x-17=60\)
\(x=17+60\)
\(\Rightarrow x=77\)
b)\(\left(x-28\right):12=8\)
\(x-28=96\)
\(x=96+28\)
\(\Rightarrow x=124\)
c)\(26+8x=6x+46\)
\(8x-6x=46-26\)
\(2x=20\)
\(\Rightarrow x=10\)
d)\(3600:\left[\left(5x+335\right):x\right]=50\)
\(\left(5x+335\right)x=72\)
\(5x+335=72x\)
\(335=67x\)
\(\Rightarrow x=\frac{335}{67}=5\)
a)720: (x-17)=12
x-17=720:12
x-17=60
x=60+17
x=17
b)(x-28):12=8
x-28=8x12
x-28=96
x=96+28
x=124
c)26+8x=6x+46
26+8x-6x=46
2x=46-26
2x=20
x=20:2
x=10
d)3600:((5x+335):x)=50
(5x+335):x=3600:50
5x:x+335:x=720
5+335:x=720
335:x=720-5
335:x=715
x=335:715
x=67/143
a) \(720:\left(x-17\right)=12\)
\(\Leftrightarrow x-17=720:12\)
\(\Leftrightarrow x-17=60\)
\(\Leftrightarrow x=60+17\)
\(\Leftrightarrow x=77\)
b) \(\left(x-28\right):12=8\)
\(\Leftrightarrow x-28=8\cdot12\)
\(\Leftrightarrow x-28=96\)
\(\Leftrightarrow x=96+28\)
\(\Leftrightarrow x=124\)
c) \(26+8x=6x+46\)
\(\Leftrightarrow8x-6x=46-26\)
\(\Leftrightarrow2x=40\)
\(\Leftrightarrow x=20\)
d) \(3600:\left[\left(5x+335\right):x\right]=50\)
\(\Leftrightarrow\left(5x+335\right):x=3600:50\)
\(\Leftrightarrow\left(5x+335\right):x=72\)
\(\Leftrightarrow5x+335=72x\)
\(\Leftrightarrow67x=335\)
\(\Leftrightarrow x=5\)
\(720\div\left(x-17\right)=12\) \(\left(x-28\right)\div12=8\)
\(x-17=720\div12\) \(x-28=8.12\)
\(x-17=60\) \(x-28=96\)
\(x=60+17\) \(x=96+28\)
\(x=77\) \(x=124\)
\(26+8x=6x+46\) \(3600\div\left[\left(5x+335\right)\div x\right]=50\)
\(46-26=8x-6x\) \(\left(5x+335\right)\div x=3600\div50\)
\(20=2x\) \(\left(5x+335\right)\div x=72\)
\(x=20\div2\) \(5x+335=72x\)
\(x=10\) \(72x-5x=335\)
\(67x=335\)
\(\Rightarrow x=335\div67=5\)
