2.1x+7=1.2x-2

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Solution for 2.1x+7=1.2x-2 equation:


Simplifying
2.1x + 7 = 1.2x + -2

Reorder the terms:
7 + 2.1x = 1.2x + -2

Reorder the terms:
7 + 2.1x = -2 + 1.2x

Solving
7 + 2.1x = -2 + 1.2x

Solving for variable 'x'.

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

Add '-1.2x' to each side of the equation.
7 + 2.1x + -1.2x = -2 + 1.2x + -1.2x

Combine like terms: 2.1x + -1.2x = 0.9x
7 + 0.9x = -2 + 1.2x + -1.2x

Combine like terms: 1.2x + -1.2x = 0.0
7 + 0.9x = -2 + 0.0
7 + 0.9x = -2

Add '-7' to each side of the equation.
7 + -7 + 0.9x = -2 + -7

Combine like terms: 7 + -7 = 0
0 + 0.9x = -2 + -7
0.9x = -2 + -7

Combine like terms: -2 + -7 = -9
0.9x = -9

Divide each side by '0.9'.
x = -10

Simplifying
x = -10

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