0.7r+1.9+0.1r=5.5-0.4

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Solution for 0.7r+1.9+0.1r=5.5-0.4 equation: 


Simplifying
0.7r + 1.9 + 0.1r = 5.5 + -0.4

Reorder the terms:
1.9 + 0.7r + 0.1r = 5.5 + -0.4

Combine like terms: 0.7r + 0.1r = 0.8r
1.9 + 0.8r = 5.5 + -0.4

Combine like terms: 5.5 + -0.4 = 5.1
1.9 + 0.8r = 5.1

Solving
1.9 + 0.8r = 5.1

Solving for variable 'r'.

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

Add '-1.9' to each side of the equation.
1.9 + -1.9 + 0.8r = 5.1 + -1.9

Combine like terms: 1.9 + -1.9 = 0.0
0.0 + 0.8r = 5.1 + -1.9
0.8r = 5.1 + -1.9

Combine like terms: 5.1 + -1.9 = 3.2
0.8r = 3.2

Divide each side by '0.8'.
r = 4

Simplifying
r = 4

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