3x+1+7x+4=90

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Solution for 3x+1+7x+4=90 equation: 


Simplifying
3x + 1 + 7x + 4 = 90

Reorder the terms:
1 + 4 + 3x + 7x = 90

Combine like terms: 1 + 4 = 5
5 + 3x + 7x = 90

Combine like terms: 3x + 7x = 10x
5 + 10x = 90

Solving
5 + 10x = 90

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 + 10x = 90 + -5

Combine like terms: 5 + -5 = 0
0 + 10x = 90 + -5
10x = 90 + -5

Combine like terms: 90 + -5 = 85
10x = 85

Divide each side by '10'.
x = 8.5

Simplifying
x = 8.5

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