-2(1+3r)=-9-7r

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Solution for -2(1+3r)=-9-7r equation:


Simplifying
-2(1 + 3r) = -9 + -7r
(1 * -2 + 3r * -2) = -9 + -7r
(-2 + -6r) = -9 + -7r

Solving
-2 + -6r = -9 + -7r

Solving for variable 'r'.

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

Add '7r' to each side of the equation.
-2 + -6r + 7r = -9 + -7r + 7r

Combine like terms: -6r + 7r = 1r
-2 + 1r = -9 + -7r + 7r

Combine like terms: -7r + 7r = 0
-2 + 1r = -9 + 0
-2 + 1r = -9

Add '2' to each side of the equation.
-2 + 2 + 1r = -9 + 2

Combine like terms: -2 + 2 = 0
0 + 1r = -9 + 2
1r = -9 + 2

Combine like terms: -9 + 2 = -7
1r = -7

Divide each side by '1'.
r = -7

Simplifying
r = -7

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