4.3r-7.4(3.9-1.9r)=-172.068

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Solution for 4.3r-7.4(3.9-1.9r)=-172.068 equation:


Simplifying
4.3r + -7.4(3.9 + -1.9r) = -172.068
4.3r + (3.9 * -7.4 + -1.9r * -7.4) = -172.068
4.3r + (-28.86 + 14.06r) = -172.068

Reorder the terms:
-28.86 + 4.3r + 14.06r = -172.068

Combine like terms: 4.3r + 14.06r = 18.36r
-28.86 + 18.36r = -172.068

Solving
-28.86 + 18.36r = -172.068

Solving for variable 'r'.

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

Add '28.86' to each side of the equation.
-28.86 + 28.86 + 18.36r = -172.068 + 28.86

Combine like terms: -28.86 + 28.86 = 0.00
0.00 + 18.36r = -172.068 + 28.86
18.36r = -172.068 + 28.86

Combine like terms: -172.068 + 28.86 = -143.208
18.36r = -143.208

Divide each side by '18.36'.
r = -7.8

Simplifying
r = -7.8

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