2x+4-7x=-21

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Solution for 2x+4-7x=-21 equation:


Simplifying
2x + 4 + -7x = -21

Reorder the terms:
4 + 2x + -7x = -21

Combine like terms: 2x + -7x = -5x
4 + -5x = -21

Solving
4 + -5x = -21

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + -5x = -21 + -4

Combine like terms: 4 + -4 = 0
0 + -5x = -21 + -4
-5x = -21 + -4

Combine like terms: -21 + -4 = -25
-5x = -25

Divide each side by '-5'.
x = 5

Simplifying
x = 5

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