3x+42+4x+140=-21

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Solution for 3x+42+4x+140=-21 equation: 


Simplifying
3x + 42 + 4x + 140 = -21

Reorder the terms:
42 + 140 + 3x + 4x = -21

Combine like terms: 42 + 140 = 182
182 + 3x + 4x = -21

Combine like terms: 3x + 4x = 7x
182 + 7x = -21

Solving
182 + 7x = -21

Solving for variable 'x'.

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

Add '-182' to each side of the equation.
182 + -182 + 7x = -21 + -182

Combine like terms: 182 + -182 = 0
0 + 7x = -21 + -182
7x = -21 + -182

Combine like terms: -21 + -182 = -203
7x = -203

Divide each side by '7'.
x = -29

Simplifying
x = -29

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