7x+2(x-10)=70

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Solution for 7x+2(x-10)=70 equation:


Simplifying
7x + 2(x + -10) = 70

Reorder the terms:
7x + 2(-10 + x) = 70
7x + (-10 * 2 + x * 2) = 70
7x + (-20 + 2x) = 70

Reorder the terms:
-20 + 7x + 2x = 70

Combine like terms: 7x + 2x = 9x
-20 + 9x = 70

Solving
-20 + 9x = 70

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + 20 + 9x = 70 + 20

Combine like terms: -20 + 20 = 0
0 + 9x = 70 + 20
9x = 70 + 20

Combine like terms: 70 + 20 = 90
9x = 90

Divide each side by '9'.
x = 10

Simplifying
x = 10

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