9+21(u-11)+10u=3(10u+7)

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Solution for 9+21(u-11)+10u=3(10u+7) equation:


Simplifying
9 + 21(u + -11) + 10u = 3(10u + 7)

Reorder the terms:
9 + 21(-11 + u) + 10u = 3(10u + 7)
9 + (-11 * 21 + u * 21) + 10u = 3(10u + 7)
9 + (-231 + 21u) + 10u = 3(10u + 7)

Combine like terms: 9 + -231 = -222
-222 + 21u + 10u = 3(10u + 7)

Combine like terms: 21u + 10u = 31u
-222 + 31u = 3(10u + 7)

Reorder the terms:
-222 + 31u = 3(7 + 10u)
-222 + 31u = (7 * 3 + 10u * 3)
-222 + 31u = (21 + 30u)

Solving
-222 + 31u = 21 + 30u

Solving for variable 'u'.

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

Add '-30u' to each side of the equation.
-222 + 31u + -30u = 21 + 30u + -30u

Combine like terms: 31u + -30u = 1u
-222 + 1u = 21 + 30u + -30u

Combine like terms: 30u + -30u = 0
-222 + 1u = 21 + 0
-222 + 1u = 21

Add '222' to each side of the equation.
-222 + 222 + 1u = 21 + 222

Combine like terms: -222 + 222 = 0
0 + 1u = 21 + 222
1u = 21 + 222

Combine like terms: 21 + 222 = 243
1u = 243

Divide each side by '1'.
u = 243

Simplifying
u = 243

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