-3.5(1+3r)=7

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Solution for -3.5(1+3r)=7 equation: 


Simplifying
-3.5(1 + 3r) = 7
(1 * -3.5 + 3r * -3.5) = 7
(-3.5 + -10.5r) = 7

Solving
-3.5 + -10.5r = 7

Solving for variable 'r'.

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

Add '3.5' to each side of the equation.
-3.5 + 3.5 + -10.5r = 7 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -10.5r = 7 + 3.5
-10.5r = 7 + 3.5

Combine like terms: 7 + 3.5 = 10.5
-10.5r = 10.5

Divide each side by '-10.5'.
r = -1

Simplifying
r = -1

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