90-(7x+10)=7(x+5)+x

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Solution for 90-(7x+10)=7(x+5)+x equation:


Simplifying
90 + -1(7x + 10) = 7(x + 5) + x

Reorder the terms:
90 + -1(10 + 7x) = 7(x + 5) + x
90 + (10 * -1 + 7x * -1) = 7(x + 5) + x
90 + (-10 + -7x) = 7(x + 5) + x

Combine like terms: 90 + -10 = 80
80 + -7x = 7(x + 5) + x

Reorder the terms:
80 + -7x = 7(5 + x) + x
80 + -7x = (5 * 7 + x * 7) + x
80 + -7x = (35 + 7x) + x

Combine like terms: 7x + x = 8x
80 + -7x = 35 + 8x

Solving
80 + -7x = 35 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
80 + -7x + -8x = 35 + 8x + -8x

Combine like terms: -7x + -8x = -15x
80 + -15x = 35 + 8x + -8x

Combine like terms: 8x + -8x = 0
80 + -15x = 35 + 0
80 + -15x = 35

Add '-80' to each side of the equation.
80 + -80 + -15x = 35 + -80

Combine like terms: 80 + -80 = 0
0 + -15x = 35 + -80
-15x = 35 + -80

Combine like terms: 35 + -80 = -45
-15x = -45

Divide each side by '-15'.
x = 3

Simplifying
x = 3

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