(3)3x+(4)2x-5-7x=20

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Solution for (3)3x+(4)2x-5-7x=20 equation:


Simplifying
(3) * 3x + (4) * 2x + -5 + -7x = 20

Multiply 3 * 3
9x + (4) * 2x + -5 + -7x = 20

Multiply 4 * 2
9x + 8x + -5 + -7x = 20

Reorder the terms:
-5 + 9x + 8x + -7x = 20

Combine like terms: 9x + 8x = 17x
-5 + 17x + -7x = 20

Combine like terms: 17x + -7x = 10x
-5 + 10x = 20

Solving
-5 + 10x = 20

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 10x = 20 + 5

Combine like terms: -5 + 5 = 0
0 + 10x = 20 + 5
10x = 20 + 5

Combine like terms: 20 + 5 = 25
10x = 25

Divide each side by '10'.
x = 2.5

Simplifying
x = 2.5

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