7x+4+15x-2=90

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Solution for 7x+4+15x-2=90 equation:


Simplifying
7x + 4 + 15x + -2 = 90

Reorder the terms:
4 + -2 + 7x + 15x = 90

Combine like terms: 4 + -2 = 2
2 + 7x + 15x = 90

Combine like terms: 7x + 15x = 22x
2 + 22x = 90

Solving
2 + 22x = 90

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 22x = 90 + -2

Combine like terms: 2 + -2 = 0
0 + 22x = 90 + -2
22x = 90 + -2

Combine like terms: 90 + -2 = 88
22x = 88

Divide each side by '22'.
x = 4

Simplifying
x = 4

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