155-(7x+15)=7(x+5)+x

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Solution for 155-(7x+15)=7(x+5)+x equation:


Simplifying
155 + -1(7x + 15) = 7(x + 5) + x

Reorder the terms:
155 + -1(15 + 7x) = 7(x + 5) + x
155 + (15 * -1 + 7x * -1) = 7(x + 5) + x
155 + (-15 + -7x) = 7(x + 5) + x

Combine like terms: 155 + -15 = 140
140 + -7x = 7(x + 5) + x

Reorder the terms:
140 + -7x = 7(5 + x) + x
140 + -7x = (5 * 7 + x * 7) + x
140 + -7x = (35 + 7x) + x

Combine like terms: 7x + x = 8x
140 + -7x = 35 + 8x

Solving
140 + -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.
140 + -7x + -8x = 35 + 8x + -8x

Combine like terms: -7x + -8x = -15x
140 + -15x = 35 + 8x + -8x

Combine like terms: 8x + -8x = 0
140 + -15x = 35 + 0
140 + -15x = 35

Add '-140' to each side of the equation.
140 + -140 + -15x = 35 + -140

Combine like terms: 140 + -140 = 0
0 + -15x = 35 + -140
-15x = 35 + -140

Combine like terms: 35 + -140 = -105
-15x = -105

Divide each side by '-15'.
x = 7

Simplifying
x = 7

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