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2\times 2=-3+2\left(u-5\right)\times 2
Variable u cannot be equal to 5 since division by zero is not defined. Multiply both sides of the equation by 2\left(u-5\right), the least common multiple of u-5,2u-10.
4=-3+2\left(u-5\right)\times 2
Multiply 2 and 2 to get 4.
4=-3+4\left(u-5\right)
Multiply 2 and 2 to get 4.
4=-3+4u-20
Use the distributive property to multiply 4 by u-5.
4=-23+4u
Subtract 20 from -3 to get -23.
-23+4u=4
Swap sides so that all variable terms are on the left hand side.
4u=4+23
Add 23 to both sides.
4u=27
Add 4 and 23 to get 27.
u=\frac{27}{4}
Divide both sides by 4.