Solve for x
x = \frac{178}{7} = 25\frac{3}{7} \approx 25.428571429
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7x-40=138
Multiply 2 and 20 to get 40.
7x=138+40
Add 40 to both sides.
7x=178
Add 138 and 40 to get 178.
x=\frac{178}{7}
Divide both sides by 7.
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