30u-21=-10u-7.5

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Solution for 30u-21=-10u-7.5 equation:


Simplifying
30u + -21 = -10u + -7.5

Reorder the terms:
-21 + 30u = -10u + -7.5

Reorder the terms:
-21 + 30u = -7.5 + -10u

Solving
-21 + 30u = -7.5 + -10u

Solving for variable 'u'.

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

Add '10u' to each side of the equation.
-21 + 30u + 10u = -7.5 + -10u + 10u

Combine like terms: 30u + 10u = 40u
-21 + 40u = -7.5 + -10u + 10u

Combine like terms: -10u + 10u = 0
-21 + 40u = -7.5 + 0
-21 + 40u = -7.5

Add '21' to each side of the equation.
-21 + 21 + 40u = -7.5 + 21

Combine like terms: -21 + 21 = 0
0 + 40u = -7.5 + 21
40u = -7.5 + 21

Combine like terms: -7.5 + 21 = 13.5
40u = 13.5

Divide each side by '40'.
u = 0.3375

Simplifying
u = 0.3375

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