9x+7+12x+5=90

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Solution for 9x+7+12x+5=90 equation:


Simplifying
9x + 7 + 12x + 5 = 90

Reorder the terms:
7 + 5 + 9x + 12x = 90

Combine like terms: 7 + 5 = 12
12 + 9x + 12x = 90

Combine like terms: 9x + 12x = 21x
12 + 21x = 90

Solving
12 + 21x = 90

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 21x = 90 + -12

Combine like terms: 12 + -12 = 0
0 + 21x = 90 + -12
21x = 90 + -12

Combine like terms: 90 + -12 = 78
21x = 78

Divide each side by '21'.
x = 3.714285714

Simplifying
x = 3.714285714

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