x*8+30=x*4+90

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Solution for x*8+30=x*4+90 equation:


Simplifying
x * 8 + 30 = x * 4 + 90

Reorder the terms for easier multiplication:
8x + 30 = x * 4 + 90

Reorder the terms:
30 + 8x = x * 4 + 90

Reorder the terms for easier multiplication:
30 + 8x = 4x + 90

Reorder the terms:
30 + 8x = 90 + 4x

Solving
30 + 8x = 90 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
30 + 8x + -4x = 90 + 4x + -4x

Combine like terms: 8x + -4x = 4x
30 + 4x = 90 + 4x + -4x

Combine like terms: 4x + -4x = 0
30 + 4x = 90 + 0
30 + 4x = 90

Add '-30' to each side of the equation.
30 + -30 + 4x = 90 + -30

Combine like terms: 30 + -30 = 0
0 + 4x = 90 + -30
4x = 90 + -30

Combine like terms: 90 + -30 = 60
4x = 60

Divide each side by '4'.
x = 15

Simplifying
x = 15

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