7x+21+3x+6=42

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Solution for 7x+21+3x+6=42 equation:


Simplifying
7x + 21 + 3x + 6 = 42

Reorder the terms:
21 + 6 + 7x + 3x = 42

Combine like terms: 21 + 6 = 27
27 + 7x + 3x = 42

Combine like terms: 7x + 3x = 10x
27 + 10x = 42

Solving
27 + 10x = 42

Solving for variable 'x'.

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

Add '-27' to each side of the equation.
27 + -27 + 10x = 42 + -27

Combine like terms: 27 + -27 = 0
0 + 10x = 42 + -27
10x = 42 + -27

Combine like terms: 42 + -27 = 15
10x = 15

Divide each side by '10'.
x = 1.5

Simplifying
x = 1.5

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