Solve for u
u = \frac{18}{7} = 2\frac{4}{7} \approx 2.571428571
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-3\left(-4\right)=7u-6
Subtract 8 from 4 to get -4.
12=7u-6
Multiply -3 and -4 to get 12.
7u-6=12
Swap sides so that all variable terms are on the left hand side.
7u=12+6
Add 6 to both sides.
7u=18
Add 12 and 6 to get 18.
u=\frac{18}{7}
Divide both sides by 7.
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Limits
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