7x+5+x-2=4x+21

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Solution for 7x+5+x-2=4x+21 equation:


Simplifying
7x + 5 + x + -2 = 4x + 21

Reorder the terms:
5 + -2 + 7x + x = 4x + 21

Combine like terms: 5 + -2 = 3
3 + 7x + x = 4x + 21

Combine like terms: 7x + x = 8x
3 + 8x = 4x + 21

Reorder the terms:
3 + 8x = 21 + 4x

Solving
3 + 8x = 21 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
3 + 8x + -4x = 21 + 4x + -4x

Combine like terms: 8x + -4x = 4x
3 + 4x = 21 + 4x + -4x

Combine like terms: 4x + -4x = 0
3 + 4x = 21 + 0
3 + 4x = 21

Add '-3' to each side of the equation.
3 + -3 + 4x = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = 21 + -3
4x = 21 + -3

Combine like terms: 21 + -3 = 18
4x = 18

Divide each side by '4'.
x = 4.5

Simplifying
x = 4.5

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