3x=40-7x

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Solution for 3x=40-7x equation: 


Simplifying
3x = 40 + -7x

Solving
3x = 40 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
3x + 7x = 40 + -7x + 7x

Combine like terms: 3x + 7x = 10x
10x = 40 + -7x + 7x

Combine like terms: -7x + 7x = 0
10x = 40 + 0
10x = 40

Divide each side by '10'.
x = 4

Simplifying
x = 4

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