3x-40+4x=40-x

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Solution for 3x-40+4x=40-x equation:


Simplifying
3x + -40 + 4x = 40 + -1x

Reorder the terms:
-40 + 3x + 4x = 40 + -1x

Combine like terms: 3x + 4x = 7x
-40 + 7x = 40 + -1x

Solving
-40 + 7x = 40 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-40 + 7x + x = 40 + -1x + x

Combine like terms: 7x + x = 8x
-40 + 8x = 40 + -1x + x

Combine like terms: -1x + x = 0
-40 + 8x = 40 + 0
-40 + 8x = 40

Add '40' to each side of the equation.
-40 + 40 + 8x = 40 + 40

Combine like terms: -40 + 40 = 0
0 + 8x = 40 + 40
8x = 40 + 40

Combine like terms: 40 + 40 = 80
8x = 80

Divide each side by '8'.
x = 10

Simplifying
x = 10

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