7x+8x-5=21

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Solution for 7x+8x-5=21 equation:


Simplifying
7x + 8x + -5 = 21

Reorder the terms:
-5 + 7x + 8x = 21

Combine like terms: 7x + 8x = 15x
-5 + 15x = 21

Solving
-5 + 15x = 21

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 15x = 21 + 5

Combine like terms: -5 + 5 = 0
0 + 15x = 21 + 5
15x = 21 + 5

Combine like terms: 21 + 5 = 26
15x = 26

Divide each side by '15'.
x = 1.733333333

Simplifying
x = 1.733333333

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