2.1+x=7.5

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Solution for 2.1+x=7.5 equation: 


Simplifying
2.1 + x = 7.5

Solving
2.1 + x = 7.5

Solving for variable 'x'.

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

Add '-2.1' to each side of the equation.
2.1 + -2.1 + x = 7.5 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 + x = 7.5 + -2.1
x = 7.5 + -2.1

Combine like terms: 7.5 + -2.1 = 5.4
x = 5.4

Simplifying
x = 5.4

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