3x+20+4x+5=8x+15

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Solution for 3x+20+4x+5=8x+15 equation:


Simplifying
3x + 20 + 4x + 5 = 8x + 15

Reorder the terms:
20 + 5 + 3x + 4x = 8x + 15

Combine like terms: 20 + 5 = 25
25 + 3x + 4x = 8x + 15

Combine like terms: 3x + 4x = 7x
25 + 7x = 8x + 15

Reorder the terms:
25 + 7x = 15 + 8x

Solving
25 + 7x = 15 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
25 + 7x + -8x = 15 + 8x + -8x

Combine like terms: 7x + -8x = -1x
25 + -1x = 15 + 8x + -8x

Combine like terms: 8x + -8x = 0
25 + -1x = 15 + 0
25 + -1x = 15

Add '-25' to each side of the equation.
25 + -25 + -1x = 15 + -25

Combine like terms: 25 + -25 = 0
0 + -1x = 15 + -25
-1x = 15 + -25

Combine like terms: 15 + -25 = -10
-1x = -10

Divide each side by '-1'.
x = 10

Simplifying
x = 10

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