.21+t=.9

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Solution for .21+t=.9 equation: 


Simplifying
0.21 + t = 0.9

Solving
0.21 + t = 0.9

Solving for variable 't'.

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

Add '-0.21' to each side of the equation.
0.21 + -0.21 + t = 0.9 + -0.21

Combine like terms: 0.21 + -0.21 = 0.00
0.00 + t = 0.9 + -0.21
t = 0.9 + -0.21

Combine like terms: 0.9 + -0.21 = 0.69
t = 0.69

Simplifying
t = 0.69

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