(10x+8x-3)-(10x+7)=30

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Solution for (10x+8x-3)-(10x+7)=30 equation:


Simplifying
(10x + 8x + -3) + -1(10x + 7) = 30

Reorder the terms:
(-3 + 10x + 8x) + -1(10x + 7) = 30

Combine like terms: 10x + 8x = 18x
(-3 + 18x) + -1(10x + 7) = 30

Remove parenthesis around (-3 + 18x)
-3 + 18x + -1(10x + 7) = 30

Reorder the terms:
-3 + 18x + -1(7 + 10x) = 30
-3 + 18x + (7 * -1 + 10x * -1) = 30
-3 + 18x + (-7 + -10x) = 30

Reorder the terms:
-3 + -7 + 18x + -10x = 30

Combine like terms: -3 + -7 = -10
-10 + 18x + -10x = 30

Combine like terms: 18x + -10x = 8x
-10 + 8x = 30

Solving
-10 + 8x = 30

Solving for variable 'x'.

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

Add '10' to each side of the equation.
-10 + 10 + 8x = 30 + 10

Combine like terms: -10 + 10 = 0
0 + 8x = 30 + 10
8x = 30 + 10

Combine like terms: 30 + 10 = 40
8x = 40

Divide each side by '8'.
x = 5

Simplifying
x = 5

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