-7x+3+4x=21

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Solution for -7x+3+4x=21 equation:


Simplifying
-7x + 3 + 4x = 21

Reorder the terms:
3 + -7x + 4x = 21

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

Solving
3 + -3x = 21

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + -3x = 21 + -3

Combine like terms: 3 + -3 = 0
0 + -3x = 21 + -3
-3x = 21 + -3

Combine like terms: 21 + -3 = 18
-3x = 18

Divide each side by '-3'.
x = -6

Simplifying
x = -6

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