18=3x+4x-3

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Solution for 18=3x+4x-3 equation:


Simplifying
18 = 3x + 4x + -3

Reorder the terms:
18 = -3 + 3x + 4x

Combine like terms: 3x + 4x = 7x
18 = -3 + 7x

Solving
18 = -3 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
18 + -7x = -3 + 7x + -7x

Combine like terms: 7x + -7x = 0
18 + -7x = -3 + 0
18 + -7x = -3

Add '-18' to each side of the equation.
18 + -18 + -7x = -3 + -18

Combine like terms: 18 + -18 = 0
0 + -7x = -3 + -18
-7x = -3 + -18

Combine like terms: -3 + -18 = -21
-7x = -21

Divide each side by '-7'.
x = 3

Simplifying
x = 3

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