3=7(4+-2u)+6u

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Solution for 3=7(4+-2u)+6u equation:


Simplifying
3 = 7(4 + -2u) + 6u
3 = (4 * 7 + -2u * 7) + 6u
3 = (28 + -14u) + 6u

Combine like terms: -14u + 6u = -8u
3 = 28 + -8u

Solving
3 = 28 + -8u

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '8u' to each side of the equation.
3 + 8u = 28 + -8u + 8u

Combine like terms: -8u + 8u = 0
3 + 8u = 28 + 0
3 + 8u = 28

Add '-3' to each side of the equation.
3 + -3 + 8u = 28 + -3

Combine like terms: 3 + -3 = 0
0 + 8u = 28 + -3
8u = 28 + -3

Combine like terms: 28 + -3 = 25
8u = 25

Divide each side by '8'.
u = 3.125

Simplifying
u = 3.125

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